396 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



notnm with two furrows; scntellum with a deep fovea across the 

 base, crenuhite at bottom ; middle carina of inetathorax acutely ]>romi- 

 uent at base. Legs pale, brownish-yellow. Wings fusco-hyaline, the 

 venation brown, the stignial about as long as the marginal vein, short; 

 basal vein indistinct. Abdomen black, smooth, shining, the jjetiole -J^ 

 times as long as thick, coarsely tinted, pubescent beneath. 



9 . Length, ^""". Agrees well with the S , except the antenna' are 

 gradually incrassated t<:)ward tips, Hagellar joints 1 to gradually short- 

 ening, the basal joints rather long, the first about as long, but not so 

 thick, as the pedicel, joints 7 to very little longer than thick, the last 

 fusiform, stouter and a little longer than the two preceding joints 

 united. 



Habitai'. — Carolina and District of Columbia. 



Type S in Berlin Museum, the 9 in Coll. Ashm. 



Described from a single S specimen in IJerlin Museum, labeled as 

 having come from Dr. Zimmermann, and 2 9 specimens in my collection 

 taken near Washington. 



SPILOMICRUS Westwood. 



Phil. Mag., I, p. 129 (1832); Foistcr Hyni. Stnd., ii. j.. 123. 



(Type S. sIhjnutlicaUs Wcstw.) 



Head transverse or subglobose, the occiput rounded, the cheeks 

 slightly pubescent; ocelli 3 triangularly arranged; eyes broadly oval. 



AntenuiP inserted on a frontal prominence, 13-jointed in both sexes, 

 in 9 incrassated toward tips, sul)monilif(nnn, the sca])e subclavate ex- 

 tending beyond the ocelli ; pedicel stouter and longer than the first 

 funiclar joint; in S filiform long, covered with a short, dense pubes- 

 cence, the i)edicel small, rounded, the second funiclar joint usually as 

 long or longer than the first, the first slightly emarginate at base, the 

 joints beyond long, cylindrical. 



Maxillary palpi ri-jointed. 



Mandibles short, bifid. 



Tlun-ax long ovoid, the prothorax visible from above, morci or less 

 woolly, especially at the sides; mesonotum with two furrows often ab- 

 breviated anteriorly, seldom entirely wanting; scntellum with two 

 oblong foveas at base, metathorax short, emarginate posteriorly, tri- 

 dentate. 



Front wings pubescent, ciliated, the submarginal vein terminating 

 in a punctiform marginal vein before the middle of the wing, the costal 

 cell distinct, closed, the basal vein u.sually quite distinct; the short 

 stigmal vein often has a backward-directed branch. 



Abdomen oblong-oval, composed of seven segments in the 9 and eight 

 in the S , the ])etiole long, fluted, its apex covered by the projecting 

 base of the second segment, the second segment occupying most of the 

 surface and without sulci at base. 



