no. 1837. NEW SPECIES OF WASPS— ROHWER. 565 



distinct, small punctures, the following segments closely punctured. 

 Black; tegulae brownish; mandibles except apices, scape, interrupted 

 line on pronotum, tubercles, postscutellum, spots on all the dorsal 

 segments (meeting on the fifth and sixth) yellow; legs black, four 

 anterior knees, all the tibiae and tarsi yellow. The tibiae are dark 

 brown within. Wings fusco-hyaline ; venation reddish brown. 

 Pubescence fuscous. 



Meadow Valley, Mexico. Six females. Collected by Mr. C. H. T. 

 Townsend. 



Type.— Cat. No. 13743, U.S.N.M. 



Genus THYREOPUS Lepeletier (Ashmead). 

 THYREOPUS (THYREOPUS) VENATOR, new species. 



Very distinct, easily recognized by the closely punctured dorsulum, 

 punctured mesopleurae and separate abdominal spots. 



Female. — Length 10 mm. Median carina of the clypeus strong; 

 distance between the eyes at the clypeus about equal with the length 

 of the clypeus; facial fovea not sharply defined above; lateral ocelli 

 above the supraorbital line; post-ocellar line subequal with the ocelloc- 

 ular line; head closely punctured; first flagellar joint slightly shorter 

 than two plus three; pronotum hardly carinate but with a sharp 

 lateral tooth; dorsulum and scutellum sculptured like the head; meso- 

 pleurae with the punctures more distinct ; propodeum dorsalty irregu- 

 larly rather feebly striate, no median furrow; posterior face punctured 

 with some faint striations also, laterally finely striato-granular; legs 

 robust, rather strongly spined; abdomen elongate, shining, impunctate, 

 pygidium with somewhat elongate punctures. Black; spot on mandi- 

 bles, scape in front, line on pronotum, tubercles, large spots at the 

 sides of all the dorsal segments and four anterior tibiae in front pale 

 yellow; wings smoky-hyaline, venation black. Pubescence gray or 

 fuscous. 



Hale. — Very like the female. The tooth on the pronotum is 

 sharper; the flagellum is simple but slightly flattened; the shield is 

 wider than long, and wider at the apical third, with two or three 

 longitudinal pale lines otherwise black; and the pronotum is black. 



The suture on the mesopleurae may be strongly or feebly foveolate, 

 the scape almost entirely black, and the pronotum with small pale 

 spots, the postscutellum black or with a yellow line. 



Meadow Valley, Mexico. Collected by Mr. C. H. T. Townsend. 



Type.— Cat. No. 13744, U.S.N.M. 



THYREOPUS (BLEPHARIPUS) MELANIUS, new species. 



Related to ater Cresson, but the ocelli are not in depressions and 

 the sculpture is finer and the insect duller. 



Female. — Length 7 mm. Clypeus with a median carina, the ante- 

 rior margin rounded; space between the eyes at the clypeus slightly 



