THE CANADIAN ENTOMOLOGIST. 241 



Stroiigylogaster pacificus, sp. nov. 



Female. — Black ; head and pleurae covered with a dense sericeous pile; 

 third and fourth antennal joints subequal ; sinus at sides of ocelli almost 

 reaching the back of the head ; head and thorax remotely and coarsely 

 punctured, the palpi, the tegulae, the front angles of the thorax, the coxae 

 except at base, the trochanters, the front femora, the apical half of the 

 middle and hind femora, the front and middle tibiae, the basal half and 

 apex of the hind tibia, and the front and middle tarsi, white ; abdomen, 

 except the basal plates and the first segment, which are black, honey- 

 yellow ; apex of the abdomen with a whorl of black hairs, concealing the 

 saw, the venter honey-yellow, with a narrow black band along each side ; 

 wings transparent, their base and the costa yellow, the stigma brown, its 

 lower edge lighter, lanceolate cell without oblique cross-vein, hind wings 

 with two middle cells. Length, 6-8 mm. 



Var. — Black markings of the legs less distinct, dorsal abdominal seg- 

 ments 3-5 with a small fuscous spot at middle, segments 6-9 with a 

 transverse black band, covering almost the entire segment, apex black. 



Male. — Does not differ except in wanting the whorl of hairs at the 

 apex of the abdomen and in having all the legs white. 



T 4c? £ ■> 3? 9 ■> May 18-22, 1892; April 30, May 7, 1893; a single 

 male from the Skokomish River. 

 Stroiigylogaster j>ri?nativus, sp. nov. 



Female. — Black, antennae short, third and fourth joints subequal ; cly- 

 peus and labrum dirty white ; head sparsely punctured, thorax impunc- 

 tate ; the tegulae, the front angles of the thorax the coxae except at base, 

 the trochanters, the apex of the femora, the front and middle tibiae (in 

 some specimens slightly clouded), the base of the posterior tibia, and the 

 base of the front and middle tarsi, waxen white ; abdomen black, venter 

 and pectus black, the venter margined each side with a yellow band, in 

 some specimens these bands coalesce on the venter and form a narrow 

 margin on the dorsum ; wings hyaline, yellowish at base, veins black, the 

 apex of the costa and stigma black, lanceolate cell open, with a perpen- 

 dicular cross-nervure. in some wings the cross-vein is represented only by 

 points on the longitudinal veins, hind wings with two middle cells. 

 Length, 9 mm. 



Male. — Smaller, not so robust, legs whitish yellow, except the pos- 

 terior tibiae and tarsi, which are fuscous ; a narrow margin to abdominal 

 segments 2-5, and the apex of the abdomen yellow. 



1 $ and 15 9 9 > April 20 and May 19-23. 



