a 
above, together with transverse stripe on each of succeeding seg- 
ments, dark brown or black; mouth parts, orbits, and area about base 
of antenn, pronotum, tegule, scutellum, venter with most of lateral 
dorsal area of abdomen and sutures of segments, and legs yellowish 
resinous; face paler; hind tibix and tarsi slightly infuscated; antennz 
yellowish beneath. 
Four females. Vancouver Island, Alameda and Placer County, Cal., 
and Nevada. (Colls. U.S. Nat. Mus. and Am. Ent. Soc.) 
One male. Alameda, Cal., Mr. Koebele, collector. (Coll. U.S. Nat. 
Mus.) 
41, Pteronus koebelei new species. 
Female.—Length 5mm.; robust, shining; clypeus deeply emarginate, 
lobes broad, rounded; ocellar basin sharply defined; crest unbroken 
at middle, straight; antennal fovea very broad, extending laterally 
from base of antennz; venation normal, except that the sides of the 
third. cubital cell are parallel; stigma broad, regularly rounded on lower 
margin; Sheath regularly tapering on upper and lower margins to 
rounded apex, hairs very minute except at extreme apex, where a small 
tuft of longer hairs occurs; cerci long, slender, slightly tapering; claws 
deeply notched, rays nearly equal. Color light greenish yellow, with 
purple tinge on head and thorax; spot including ocelli, more or less of 
base of head, spot on anterior extremity of the middle lobe of meso- 
notum extending backward in a narrow line, spot on lateral lobes of 
mesonotum, one on either side of scutellum, two just within the cen- 
chri, and small spots on basal plates black; antenne black, sometimes 
ferruginous beneath; legs, especially tarsi, with distinct greenish cast; 
veins brown, stigma and costa greenish yellow. 
Five females. California and Oregon. (Coll. U.S. Nat. Mus.) 
42, Pteronus pinguidorsum Dyar. 
1895. Nematus pinguidorsum Dyar. Trans. Am. Ent. Soc., xxtl, p. 303. 
Female.—Length 8 mm.; robust, shining; clypeus deeply, circularly 
emarginate, lobes broad, circular, rounded at tip; ocellar, basin dis- 
tinctly defined, lateral walls not very sharply raised, crest unbroken, 
fovea deep, extending laterally over bases of antennwe; antenne slender, 
tapering, joints 3 and 4 subequal; venation normal; stigma narrow, 
sides almost parallel, rather abruptly truncate at tip; sheath robust, 
obliquely truncate at tip; claws strong, deeply notched. Color light 
yellow, inclined to pallid; small spot connecting ocelli, antenne 
above, and anterior edge of cenchri dark brown or black; anterior 
lobes of mesonotum brownish purple, head above tinged with purple; 
antenne beneath yellowish; posterior tibiz toward tips and all tarsi 
very slightly infuscated; extreme tip of sheath brown; stigma yellow; 
veins dark brown; wings hyaline. 
