66 PEOCEEDINGS OF THE NATIONAL MUSEUM vol. 60 



scutellum foveolate; sciitellum rather small, polished; propodeum 

 evenly rounded antero-postcriorly, rugoso-reticulate, not areolated; 

 propleiira mostly polished, a little roughened anteriorly; mesopleura 

 more or less punctate or granular; posterior coxae minutely granular, 

 shining; inner spur of hind tibia very nearly half as long as the 

 basitarsus; areolet of fore wing small, triangular, usually petiolate; 

 medius very weak, sometimes almost wanting; abdomen slender; 

 jBi'st tergitc longer than broad at apex; very finely uniformly gran- 

 ular and opaque or subopaque; second tergite sometimes pohshod 

 but often delicately coriaceous; remainder of dorsum of abdomen 

 highly polished; ovipositor sheaths a little longer than the abdomen. 

 Head and thorax entirely black; anterior and middle legs, including 

 coxae, entirely yellowish ferruginous; posterior coxae varying from 

 entirely ferruginous to mostly black; hind trochanters and femora 

 ferruginous, the latter blackish apically; hind tibiae yellowish wliito, 

 with an incomplete black annulus near base and the apical third 

 black; their tarsi black; wings hyaline; first abdominal tergite 

 always completely black, the second usually yellowish on at least 

 the basal half; third and following segments entirely black. 



The above cluiractorization was drawn from the following mate- 

 rial : The types of ductus, pimploides, and wlnldeyi, 1 8 specimens in the 

 United States National Museum from the various localities in Indiana, 

 lihnois, Michigan, Minnesota, Virginia, Florida, Pennsylvania, New 

 Jersey, Massachusetts, New York, and Canada; 1 specimen from 

 Bar Harbor, Maine (C. W. Jolmson), in the collection of the Boston 

 Society of Natural History; and 1 from Illinois in the University of 

 Illinois. One of the National Museum specimens is recorded as a 

 parasite of Enlia velutinana Walker at Wmchester, Virginia. 



41. BASSUS AGILIS (Crcsson) 



Microdus agilis Cresson, Canad., Eiit., vol. 5, 1873, p. 52. 



Agathis quaesitor Provancher, Natural. Canad., vol. 12, ISSO, p. 176. 



Type. — The type of agilis is in the Philadelphia Academy of Sci- 

 ences; that of quaesitor is in the Museum of Pul)lic Instruction at 

 Quebec. 



The original description of queasitor and notes tm Provancher's 

 type by S. A. Rohwer describe agilis so exactly that I have no hesita- 

 tion in considering the two names synonymous, although I have not 

 seen the type of quaesito)\ Tliis species is relatively ver^^ constant 

 in color and sculpture, and is usually very easily distinguished. Face 

 about as long as broad, ])ut not roslriform; malar space inclining 

 strongly inwardly, and at least half as long as the eyes; clypeus some- 

 what convex, more than twice as broad as long, and broadly emar- 

 ginate at apex; tliird segment of labial palpi short biit distinct, 

 somewhat less than half as long as the second segment; a sliarp 



