274 CHARLES ROBERTSON. 



Calliopsiiis conipositariiin 9- — Black; opaque; face below anteuiise 

 rather sparsely and coarsely puuctured, shining; vertex finely and densely punc- 

 tured ; mandibles rufous, labrum shining, truncate; flagellum dull testaceous 

 beneath ; pubescence on vertex and thorax above short, griseous, elsewhere thin 

 and pale; mesonotuni and scutellum densely aud somewhat conflueutly puuc- 

 tured ; wings subhyaline, nervures and tegulse exteriorly testaceous; legs black- 

 ish, anterior and middle knees with a yellowish spot; apical joints of tarsi 

 ferruginous; metanotum with short longitudinal ridges on the disc; abdomen 

 depressed, opaque, except in middle of first segment, where it is shining and 

 impunctate, densely and finely puuctured ; broad, depressed, apical margins of 

 segments dull testaceous, apical segments subfasciate with very thin whitish 

 pubescence. Length 6 mm. 



Hah. — Illinois ; two specimens. 



Calliopi^is solidagiiiis 9- — Black, nearly opaque, clothed with thin, 

 pale pubescence, that on vertex and thorax above inclining to ochraceous; head 

 with rather coarse, sparse punctures, more fine aud dense on vertex; mandibles 

 rufous, flagellum testaceous in the middle beneath ; mesothorax rather closely 

 and coarsely punctured, slightly shining; disc of metanotum with fine longitu- 

 dinal ridges; wings subhyaline; nervures, stigma and tegulse testaceous; legs 

 blackish, anterior and middle knees with a yellow spot, posterior tarsi pale tes- 

 taceous, apical joint fuscous; abdomen shining, finely puuctured, very sparsely 

 on first segment, depressed apical margins dull testaceous. Length 6 mm. 



Hab. — Illinois ; one specimen. 



This species is less opaque and less densely punctured than the 

 preceding. It is more densely punctured and less shining than C. 

 albitarsis Cr. 9 • 



Noinada bi»«igiiata Say. 



In Proc. Ent. Soc. Phil, ii, Mr. Cresson described as new species 

 JV. amoena, N. depressa, N. maculata, N. obliterata, N. perplexd, K. 

 jjygincea, and undertook to characterize N. bisignata as distinct. 

 Under N. maculata he says the variant forms may prove to be va- 

 rieties of either americana Kirby, valicla Smith, ruficornis Linn., or 

 bisignata Say. In his " Catalogue of the Described Hymenoptera 

 of America north of Mexico," the above species are referred back 

 as mere varieties of N. bisignata Say, and with them are referred 

 N. americana Kby. and valida Sm. The t>rnaraents of the bisignata 

 group are described in great detail, but, on account of the failure to 

 discover certain structural characters, the effort to separate the spe- 

 cies has proved hopeless, and the accumulation of specimens has 

 seemed to prove that the forms are only varieties. I am not pre- 

 pared to pass upon all of the originally proposed new species, but 

 give the results of my study of the group as based upon specimens 

 taken by myself in my own neighborhood (Carlinville, 111.). 



