VO l889. n '] PROCEEDINGS OF THE NATIONAL MUSEUM. 441 



tegulse, a spot beneath it, and a spot on the disk of scntellnin, yellowish- 

 white. Anterior and middle legs, yellow- ferruginous; the middle tarsal 

 joints tipped with black ; posterior legs rufous, their coxre with a large 

 black spot at base above, their tibiae towards apex and the tarsi, black. 

 The parapsidal grooves are slightly indicated anteriorly ; metatborax 

 keeled, the two middle keels close together and converging toward each 

 other at base forming a triangular area. Abdomen black, delicately 

 sculptured, the extreme apical edges of the segments showing a little 

 white; the disk of the first segmeut being bicarinated for two-thirds 

 its length. Wings hyaline; stigma and veins brown, the inner margin 

 of costae and basal nervures, yellowish; areolet absent. 



Habitat. — Virginia. 



Described from a single specimen. This species comes nearest to B. 

 euurw, but is readily separated from it and other species by colora- 

 tional details. 



PRIONOPODA Holmgren. 

 Prionopoda scutellata sp. nov. 



Female. — Length, 6 mm . Robust, yellpw-ferruginous; stemmaticum 

 and anteriorly to base of antenna?, disk of mesothorax, except pale 

 parapsidal lines two-thirds the length of mesonotum, disk of metatbo- 

 rax, disk of first abdominal segment, and the apex of posterior tibiae 

 and their tarsi, black. Antennas longer than the whole insect, gradu- 

 ally acuminated towards apex, black, the scape and tlagellum beneath, 

 ferruginous. Scutellum ferruginous. Head and thorax densely, finely 

 punctured. Metatborax strongly areolateu. The head is large, sub- 

 quadrate, the cheeks as wide as the eye; palpi and anterior and middle 

 coxos and trochanters, yellowish-white; claws pectinated. Abdomen, 

 except the petiole, which is punctate and broadly widened posteriorly, 

 smooth, polished. Wings hyaline; stigma black, veins brown- black ; 

 areolet triangular. 



Haitat. — Washington, D. 0. 



Described from one specimen taken at large in August. 



TREMATOPYGUS Holmgren. 



(?) Trematopygus cultriformis sp. nov. 



Female.— Length, 5 mm . Black, shining. Scape beneath, a promi- 

 nence on middle of face, and legs, iucludiug coxa", ferruginous. Teguhe, 

 a line beneath and an abbreviated line at sides of mesonotum, yellow; 

 flagellum brown ; mesopectus obscurely rufous. Metatborax rugose, 

 areolated. Abdomen sessile, beyond the second segment strongly com- 

 pressed, cultriform, the first segment more than twice as long as wide, 

 rugulose, the sides keeled above; second segment about as long as its 

 width at base, when viewed from above of a triangular shape, the sides 

 being compressed towards apex ; the ovipositor is slightly exserted, 



