THE CANADIAN ENTOMOLOGIST. 213 



The form of the apex of the abdomen will at once distinguish this 

 from the species which it resembles. 



Nvsson lateralis Pack. 



Nysson la t 'era le Pack., Proc. Ent. Soc. Phila., vi., 440, £ . 



$ . Differs from the £ in having an irregular line on the prothorax 

 and a dot on each side of the fourth segment of the abdomen yellow. 

 The yellow spots on the first segment of the abdomen are slightly emar- 

 ginate anteriorly. The subterminal joint of the antennae is not much 

 lengthened beneath and the terminal joint is not distinctly pinched 

 beneath. The abdomen is punctured with larger and smaller punctures, 

 the larger punctures numerous and deep on the first segment. 



Northern Illinois (E. J. Lake). 



Spilomena pusilla. 



Stigmus pusilhis Say. Bost Jour., i., 378. 



% . Head and thorax not shining like the abdomen ; wings beauti- 

 fully iridescent; mandibles, basal joints of antennas, the tegulae and legs dull 

 honey-yellow, tubercles black, the coxae and femora more or less black ; 

 upper face of metathorax enclosed by two ridges which curve inwards to 

 unite on the verge of the truncation, the enclosure transversely reticulated 

 and divided into three areas by two longitudinal ridges ; apical segment 

 of the abdomen compressed and acuminate. 



Waterbury, Conn., Aug. 8th. Taken on the leaves of a rose bush in 

 company with Passaloecus annulatus (Say) and Blepharipics minimus Pack. 



Crabro bigeminus, ;/. sp. 



% . Length 10 mm. Black ; scape, first joint of flagellum beneath, 

 mandibles except the piceous tip and lower border, interrupted line on 

 collar, tubercles and square spot behind them, dot on tegulae, two dots 

 on each anterior angle of the scutellum, the postscutellum, spot on each 

 side of metathorax, dot on posterior coxae, tips of the femora, more 

 broadly on the anterior and intermediate pairs, tibiae excepting a piceous 

 line on the four anterior beneath, basal joints of the tarsi, fasciae on all 

 the segments of the abdomen except the last, the fasciae on the first and 

 fifth segments broadest, those on the three basal segments interrupted and 

 the others narrowed in the middle, the fascia on the first segment broad- 

 est at the interruption, all yellow. Clypeus and sides of face silvery, the 



