Messatoporus argentinus Santos, sp. nov. (Figs 87, 301) Female. Fore wing 7.92 mm. HEAD: Mandible densely covered with long hairs; MLW 2.08; MWW 0.4; dorsal tooth in front view projected upwards, much longer than ventral tooth; ventral tooth triangular. MSM 0.36. Clypeus basally convex, apically abruptly flattened, centrally straight; CHW 2.03; CWW 1.91; apical area medially straight, laterally slightly projected, its margin regular, not raised. Antenna with 29 flagellomeres; flagellum uniform; apex of apical flagellomere much narrower than base, distinctly tapered. Supra-antennal area mat, coriarious, very weakly striate near antennal sockets, ventrally and around ocelli slightly concave, medially with a distinct depression but without a distinct line. Occipital carina uniformly curved, fading out at distance shorter than basal width of mandible from the hypostomal carina. Temple and gena moderately wide, gena regular (as in Fig. 260). THORAX: Pronotum centrally glabrate, moderately pilose at dorsal margin, shiny, minutely punctulate, with moderate striation along posterior margin and collar; epomia almost indistinct, distinct only after diverging from pronotal collar, short, ending far from dorsal margin of pronotum, after diverging from pronotal collar distinctly curved. Mesoscutum strongly and uniformly convex, ovoid, 1.37 × as long as wide, densely covered with short hairs, mat, densely punctulate; notaulus reaching about 0.75 of mesoscutum length, weakly impressed, surface over notaulus with weak and short transverse wrinkles; scuto-scutellar groove moderately deep, with vestigial longitudinal wrinkles. Subalar ridge moderately projected; epicnemial carina reaching about 0.85 of distance to subalar ridge, irregular; sternaulus moderately strong, wider on posterior apex, strongly sinuous, with weak vertical wrinkles; scrobe very shallow; mesopleural suture with weak longitudinal wrinkles along entire length. Mesosternum medially with short transverse wrinkles; median portion of posterior transverse carina of the mesothoracic venter short and almost indistinct, arched backwards. Transverse sulcus at base of propodeum moderately wide, about 0.49 × as long as anterior area of propodeum, with weak longitudinal wrinkles; metapleuron minutely rugulose, without transverse wrinkles, dorsally sparsely pilose, ventrally moderately pilose; juxtacoxal carina represented by very short ridges. Fore tibia distinctly swollen. Mesal lobe of t4 with 3–4 bristles. Hind coxa punctate-coriarious. PROPODEUM: 1.07 × as long as wide, shiny, densely pilose; anterior area asperous and densely punctulate; spiracle elliptic, SWL 2.83; anterior transverse carina medially slightly arched forwards. Propodeal wrinkles weak, very closely spaced, anteriorly complete and ramificate, posteriorly partly complete and partly incomplete and overlapped, anteriorly strongly curved, posteriorly somewhat irregular; posterior transverse carina distinct as moderately strong crests. WINGS: Fore wing vein 1-Rs+M distinctly sinuous, with bulla placed on basal 0.25; crossvein 1m-cu more or less uniformly curved, limit between 1m-cu and 1-Rs+M clearly traceable; vein 1M+Rs anteriorly straight, posteriorly weakly curved; fore wing crossvein 1 cu-a basad of 1M+Rs by 0.36 of its own length; vein 2Cua 0.7 × as long as crossvein 2cu-a; bulla of crossvein 2m-cu placed on midlength; cell 1+2Rs small, APH 0.55, about as high as wide, AWH 1.12; crossvein 3r-m fully spectral, 2r-m and 3r-m distinctly convergent, about same length; vein 3-M distinctly shorter than 2-M; 4-Rs distinctly sinuous; 4-M spectral, slightly curved backwards. Hind wing vein 1-M forming straight angle with vein Cua; vein 2-Rs tubular, apically spectral, reaching wing margin; HW1C 1.33; vein Cub distinctly convex on posterior half, forming distinctly obtuse angle with vein Cua (basally curved); vein 2-1A reaching 0.89 of distance to posterior wing margin. METASOMA: First tergite moderately long, about 0.39 × as long as T2–8, approximately cylindrical, ventrolaterally angled, uniformly, densely pilose; T1LW 4.67; T1WW 1.35; spiracle on 0.5 of its length, slightly prominent; median depression absent; lateral and median posterior depressions absent; ventrolateral carina weak, medially interrupted. T2LW 1.52; T2WW 2.71; thyridium much longer than wide, without small circular depression just behind it; T2–8 densely punctate and minutely and weakly coriarious, densely and uniformly pilose. OST 0.63; ovipositor slender, slightly sinuous, basally cylindric, apically slightly depressed; dorsal valve without ridges; ventral valve apex with 6 teeth, apical teeth progressively more closely spaced; surface anterior to first tooth rugulose. Color. Head and mesosoma bright orange and bright yellow, metasoma dark brown and pale yellow. Head: bright orange (201,082,046); clypeus, mandible except apex, mouthparts, malar space, supra-clypeal area and complete orbital band, bright yellow (227,192,075); scape light orange; pedicel and flagellum blackish; f8–13 entirely white, f14 mostly white. Mesosoma: bright orange; pronotal collar, dorsal margin of pronotum, scutellar carina, scutellum, axillar carinae, postscutellum, tegula, subalar ridge, dorsal division of metapleuron, small posterior mark on metapleuron and over propodeal crests, bright yellow; fore coxa light orange; fore and mid trochanters, femur, tibia and fore tarsus pale yellow; fore and mid trochanters and femur dorsally with longitudinal light brown stripe; fore tibia ventrally with longitudinal light brown stripe on basal 0.6; fore and mid t5 blackish; mid t1 and t4 brownish, t3–4 whitish; hind trochanters and femur dark brown; basal 0.4 of hind tibia, apical 0.8 of t1 and t2–5 white; apical 0.6 of hind tibia, basal 0.2 of t1 and extreme apex of t5 blackish. Metasoma: dark brown; T1 anterior 0.25 and posterior 0.2 pale yellow; T2–7 with lateral and posterior pale yellow stripes; S2–6 pale yellow with lateral dark brown marks. Male. Unknown. Variation. Head sometimes dark brown; antenna sometimes with 28 flagellomeres. Comments. Similar to M. xanthogaster sp. nov., from which it can be differentiated by having T2 anteriorly dark brown, posteriorly pale yellow (vs. anteriorly light orange, posteriorly bright yellow); pronotum ventrally orange (vs. blackish); metapleuron with posterior yellow mark, propodeum with sublateral yellow marks (vs. metapleuron and propodeum without yellow marks); T 7–8 in lateral view about same length of T5–6, or shorter (vs. longer than T5–6); ovipositor dorsal valve without ridges (vs. with four weak ridges). Biology. Unknown. Etymology. Latinized version for “from Argentina ”; in reference to the known geographic records for the species, both from Argentina. Material examined. 3 ♀. Holotype from ARGENTINA, Jujuy, 14.I.1966, Townes & Townes (AEIC). Pinned. Extreme tip of right antenna missing; left fore tarsus broken and re-glued to specimen; otherwise in good shape. Paratypes: 1 ♀ from ARGENTINA, Tucumán, Tacanas, 7–17.XII.1968, LStange; 1 ♀ from ARGENTINA, Vila Nogués, 1.I.1966, Townes & Townes (AEIC). Distribution. Recorded from two localities in northern Argentina (Fig. 301).

Published as part of Santos, Bernardo F. & Aguiar, Alexandre P., 2013, Phylogeny and revision of Messatoporus Cushman (Hymenoptera, Ichneumonidae, Cryptinae), with descriptions of sixty five new species , pp. 1-284 in Zootaxa 3634 (1) on pages 70-72, DOI: 10.11646/zootaxa.3634.1.1, http://zenodo.org/record/5262081