62 



U. S. NATIONAL MUSEUM BULLETIN 216 



Black. Apical margin of scape and more or less of pedicel pale 

 yellowish beneath; palpi, tegula, short stripe in hind angle of pro- 

 notum, front and middle coxae, and all trochanters, whitish; hind 

 coxa and all femora reddish; front and middle tibiae reddish on 

 apical 0.5, becoming whitish toward base; hind tibia broadly whitish 

 with narrow subbasal and broad apical fuscous annuli; basal segment 

 of hind tarsus broadly, and the two following segments narrowly 

 whitish at base. 



Figuees 20-22. — Localities: 20 (left), Scambiis (Scavibus) tenebrosus; 21 (center), 

 S. (S.) dioryctriae; 22 (right) S. (S.) aplopappi. 



Female: Front wing 7.5 to 9.0 mm. long; antenna with 26 to 28 

 segments; cheek about 0.28 times breadth of base of mandible; 

 temple broad, rather strongly rounded, and rather weakly receding; 

 thorax and propodeum slightly elongate, the latter with distinct, 

 dorsomedial carinae on basal 0.6; tergite 1 punctate and rugulose 

 except on basal declivity; remaining tergite3 with dense, distinct 

 punctures except on apices; sheath as long as distance from tegula 

 to apex of abdomen; ovipositor moderately compressed, and with a 

 distinct nodus, the region beyond nodus with a minute, shallow, 

 median, longitudinal sulcus. 



Black. Clypeus brown; palpi pale yellowish more or less suffused 

 with fuscous; tegula and short stripe in hind corner of pronotum 

 whitish; stigma brownish black; legs mostly reddish; trochanters 

 yellowish at apices; hind tibia with a narrow, subbasal, and a broad, 

 apical, fuscous annulus; hind tarsus with base of first segment narrowly 

 pale yellowish. 



Type: 9, Indian Head, Sask., Apr. 13, 1948, reared in incubator 

 from cone of Picea pungens, Forest Insect Survey No. 1157c (Ottawa, 

 No. 6755, in Canadian National Collection). 



