ART. 16 WASPS OF THE SUBFAMILY BKACONINAE MUESEBECK 63 



The following material served as the basis for the above discussion : 

 The type which is from Texas; 24 specimens in the National Museum 

 from Florida, Louisiana, Georgia, Wyoming, Ohio, Pennsylvania, 

 Virginia, Maryland, District of Columbia, New York, Massachusetts, 

 and Canada; 1 specimen from Illinois in the collection of the Uni- 

 versity of Illinois; and 3 specimens from Edgartown, Massachusetts, 

 in the collection of the Boston Society of Natural History. 



37. BASSUS NIGRICOXUS (Provancher) 



Microdus nigricoxus Provancher, Addit. faun. Canad. Hymen., 1886, pp. 137 

 and 138. 



Type. — In the Museum of Pubhc Instruction at Quebec Canada. 



A small species with an entirely black body and black hind femora. 

 Face short, impunctate, polished; labial palpi short, the third seg- 

 ment very small; antennae usually 32 to 36 segmented, slender; par- 

 apsidal furrows sharply impressed, usually finely foveolate; middle 

 mesonotal lobe rather strongly convex; furrow in front of scutellum 

 pitted; scutellum small, convex; propodeum coarsely irregularly ru- 

 gose; mesopleural furrow finely foveolate; metapleura closely granular 

 and opaque; posterior coxae large, a little longer than the first abdom- 

 inal segment; areolet of fore wing very small, triangular, petiolate; 

 medius very faint, almost obsolete; first abscissa of mediella slightly 

 shorter than the second; abdomen slender; first tergite much longer 

 than broad at apex, entirely closely granular and opaque; second 

 tergite a little broader than long and closely granular and opaque 

 like the first; third tergite granular basally, polished apically like the 

 remaining segments; ovipositor sheaths about as long as the abdo- 

 men or very slightly lunger. Head, thorax, and abdomen black; teg- 

 ulae black; all coxae, basal segment of trochanters, and the posterior 

 femora black; anterior and middle legs brownish yellow beyond the 

 trochanters; posterior tibiae blacldsh, with the extreme base and a 

 more or less distinct annulus on the middle brown; wings subhyaline. 



I have seen only seven specimens of this species, all of which are 

 in the United States National Museum; one of these is labeled " Cana. 

 2068, Collection C. F. Baker"; one is from Nerepis, New Brunswick 

 (A. G. Leavitt) ; one from Jamesburg, New Jersey; one from Penn- 

 sylvania; and three from Oswego, New York. 



38. BASSUS COLEOPHORAE Rohwer 



Bassus coleophorae Rohwer, Proc. U. S. Nat. Mus., vol. 49, 1915, p. 230. 

 Bassus pyrifolii Viereck, Bull. 22, Conn. Geol. and Nat. Hist. Survey, 1917 (1916) 

 pp. 226 and 229. 



Type. — The type of coleophorae is in the United States National 

 Museum; that of pyrifolii is in the collection of the agricultural experi- 

 ment station at New Haven, Connecticut. 



