. Bulletin of the Natural History Museum Geology. 70 ANTROPOV maximum thickness of mandibular base; mandible crescently curved, without inner teeth, with small external preapical notch and triangu- lar inner apical angle; middle flagellomeres 4-5 times as long as thick. Tarsomeres long, slightly broadened apically; apical tarsomere longer than penultimate one; small sharped apically arolium twice shorter than tarsal claw. Propodeum with coarsely margined and radially carinate inside and from outside dorsal enclosure. Clypeal apical margin and external and inner margins of mandible with ro
. Bulletin of the Natural History Museum Geology. 70 ANTROPOV maximum thickness of mandibular base; mandible crescently curved, without inner teeth, with small external preapical notch and triangu- lar inner apical angle; middle flagellomeres 4-5 times as long as thick. Tarsomeres long, slightly broadened apically; apical tarsomere longer than penultimate one; small sharped apically arolium twice shorter than tarsal claw. Propodeum with coarsely margined and radially carinate inside and from outside dorsal enclosure. Clypeal apical margin and external and inner margins of mandible with rows of long erect bristles, those times as long as thickness of mandibular mid part; pro- and mesothorax mainly covered with very short, directed backwards, appressed hairs practi- cally hiding dull and inpunctate surface; precoxal carina posteriorly with longer and also directed backwards dense bristles; tarsomeres I-IV ventrally with rows of dense short bristles and sparser and longer thin ventral (mainly on tarsomere I) and apical spines; apical tarsomere practically bare ventrally. Body mainly dark-brownish, without separate spots; head com- pletely, mandibles basally and apically, apical half of scapes, foretibiae apically, midcoxae, and mesopleura posteriorly black; midfemora and tibiae mainly yellow. Body length mm (without abdomen). The male is unknown. III. A new genus of Sphecidae Genus TRIGAMPULEX nov., incertae sedis ETYMOLOGY. The generic name is derived from the generic names Trigonalys and Ampulex. It is masculine. TYPE SPECIES. Trigonalys pervetus Cockerell, 1917, here desig- nated; the only species. Diagnosis. Postscutellum short. Propodeum rounded, without distinctly margined dorsal enclosure and visible lateral carinae. Legs weakly modified: femora shorter than corresponding tibiae; midtibia with two apical spurs and sparse short spines outside; tarsi elongate, with apical tarsomere connected with apex of unmodified penulti- mate tarsomere; plantul
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