THE CANADIAN ENTOMOLOGIST. 137 



spots on collar, tubercles, anterior tibiae in front, middle and posterior 

 pairs at base, and the tarsi, yellow ; the tarsi paler. Length, 5-6 mm. 



Illinois ; 24 ^ , 27 ? specimens. 



Thirteen male specimens agree with the description ; six have a 

 yellow line on mandibles ; five have a yellow spot on labrum ; three have 

 no spots on collar ; two have spots on tegulpe, and one has the scape 

 yellow exteriorly. Twenty-two female specimens have the tegulse im- 

 maculate ; five have small spots on tegulae in front, two individuals of 

 these showing the spot only on one side. This is the commonest species 

 in my neighbourhood. I have taken the sexes in copula. This is the F. 

 affinisoi Cresson (Proc. Bost. Nat. Hist., xii., 270). 



Smith mentions a spot on tegulte in P. affinis, while Say does not 

 mention it in P. viodesta. It is quite probably that Say's description was 

 based on specimens taken in Indiana. This is the only species taken 

 here which agrees with his description. What Say described as the male 

 belongs to P. pygmcea, Cr. The female of P. pygmcea usually has a spot 

 on tegulfe, but not on collar. 



Prosopis pygmcea., Cress. 



Of twenty-seven female specimens taken here (Carlinville, Illinois), 

 all except nine show a spot on clypeus, two showing three spots ; only 

 one shows no spot on the teguhe ; all have spots on tubercles and side of 

 face, and no spots on collar. The females without spots on face and 

 tubercles are referred to next. (See Trans., XXII., 116.) Of 

 twenty-three males, fourteen have no spots on tegulae, while two show 

 no spots on tubercles and are without the yellow club-shaped extension 

 of the facial markings. 



Prosopis saniculce, n. sp., c^ . — Black, opaque, the abdomen more 

 shining ; head and thorax closely and rather finely punctured ; abdomen 

 almost impunctate ; enclosure of metathorax more rugose than in P. 

 pygincea ; form slender ; scape very broad, club-shaped ; flagellum 

 beneath and apical margins of abdominal segments somewhat testaceous ; 

 a subquadrate spot on clypeus, a smaller spot above, a narrow line on 

 each side of face, anterior tibisc in front, middle and hind pairs at base, 

 and the tarsi, yellow ; face on each side near insertion of antennae with a 

 rounded depression which is smooth and shining ; wings hyaline, nervures 

 and stigma dull testaceous. Length, 4-5 mm. 



