156 KANSAS UNIVERSITY SCIENCE BULLETIN. 



J . Clypeus broadly produced anteriorly and rounded much as in 

 pepticus; joints of antenna 9-11 widened on one side; abdomen red an-J 

 blacli or entirely black. Length, 11-14 mm. 



Rather common in western Kansas. In the black variety ( ^ ) the 

 antennal joints 9-11 are not always distinctly widened, sometimes mak- 

 ing it hard to separate from pepticus. 



Tacky tes pepticus (Say). 



(Fig. 59, clypeus, ^ j ; 109, eighth ventral plate, j .) 



Lyrops peptica Say; Bost. Jour. Nat. Hist., I, 371; 1837. ^ j . 

 Tachyets pepticus Fox; Trans. Am. Ent. Soc, XIX, 242; 1892. ^ ^ • 



o . Stout. Clypeus broadly produced, slightly emarginate mesad, 

 two lateral teeth; mandibles short and stout; third joint of antennse 

 longer than fourth; vertex finely and closely punctate, scutum likewise, 

 and depressed anteriorly; scutellum very slightly impressed; disc of pro- 

 podeum with or without a very faint line, a shallow subapical furrow, a 

 strong median sulcus on posterior face; spines on posterior tibiaa rather 

 blunt; abdomen short, rather broad; pygidium rather narrow, its sides 

 nearly straight. Black; tarsi largely ferruginous; wings very slightly 

 fuscous or yellowish, venation brownish. Pubescence of face, collar, be- 

 tween the divisions of the thorax, and legs, silvery; scutum and scutel- 

 lum with very sparse, dark, erect pubescence, pale on propodeum; ab- 

 domen with four silvery fascia; pygidium with fine bronzy bristles. 

 Length, 13-16 mm. 



^ . Anterior margin of clj^peus broadly produced and rounded; joints 



3 and 4 of antenna narrowed basally; subapical fovea of propodeum shin- 

 ing and more distinct than in o ; emarg^nation of eighth ventral segment 

 broad. Length, 9-11 mm. 



Numerous specimens from western Kansas. The o o are decidedly 

 black and rather naked. 



Tachytes sericatus Cress. 

 (Fig. 60, clypeus, g .) 



Tachytes sericatus Cress; Trans. Am. Ent. Soc, IV, 216; 1872. ^ o . 

 Tachytes sericatus Fox; Trans. Am. Ent. Soc, XIX, 247; 1892. j> j . 

 o . Rather stout. Anterior margin of clypeus rounded out, a little 

 emarginate mesad, bindentate laterally; antennae rather short, joints 3 and 



4 nearly equal; punctation of head and thorax fine; disc of propodeum 

 with a very indistinct median line, the apical fovea not large; pygidium 

 somewhat triangular, not constricted apically, the sides very little bowed 

 out. Black; apical joints of tarsi brownish; wings clear; pygidial pile 

 silvery. Head and thorax with long suberect whitish pubescence; legs 

 with silvery pile and medium stout whitish spines; abdomen four-fasciate, 

 the fine appressed silvery hair giving it a rather greasy appearance. 

 Length, 12-14 mm. 



J . "Form more slender than j "; joint 3 of antennae shorter than 4; 

 eighth ventral segment roundly emarginate. Less silvery than o . 

 Length, 10-11 mm. 



