42 



U. S. NATIONAL MUSEUM BULLETIN 216 



Figures 9, 10. — Localities: 9 (left), Scambus (Scambus) protentus; 10 (right), 



S. (S.) ephialtoides. 



2. Scambus (Scambus) ephialtoides Cushman 



Figure 311,h 



Scambus ephialtoides Cushman, 1917, Proc. U. S. Nat. Mus., vol. 53, p. 466; 

 d\ ?. Part. Type: ?, Colestin, Oreg. (Washington). 



Male: Front wing 4.5 mm. long; antenna with 24 segments; head 

 very thick; temple about 0.66 times as broad as eye; thorax rather 

 slender; propodeum with dorsomedial carinae distinct, gradually 

 diverging from base and extending to apical 0.25 of propodeum; hind 

 coxa about 0.66 times as deep as long; front femur with a broad, 

 rather deep excision beneath, front tibia flattened beneath, and evenly, 

 rather strongly bent; abdomen slender; tergite 1 twice as long as 

 wide, with median carinae strong and extending to apex; tergite 2 as 

 long as tergite 1, except at apex with dense, irregular, shallow punctures; 

 remaining tergites with progressively weaker sculpture. 



Black. Palpi, pedicel beneath, and tegula, pale yellowish; stigma 

 brown; front leg with coxa blackish at base, remainder of coxa, 

 trochanter, apex of femur, and basal 0.5 of tibia, pale yellowish, 

 remainder of femur, and tibia in apical 0.5, pale reddish; middle leg 

 pale yellowish, except coxa, which is mostly blackish, and femur, 

 which is reddish except at base and apex; hind leg with coxa black, 

 trochanter mostly pale yellowish, femur brownish black with base and 

 apex narrowly yellowish, tibia broadly yellowish at middle, with a 

 fuscous mark near base and a broad, fuscous annulus at apex, tarsus 

 fuscous with segment 1 broadly, and the following segments narrowly 

 pale at base. 



Female: Length 9 mm.; head very thick, with temple as broad as 

 eye and strongly rounded behind to the weak occipital carina; cheek 

 very short; thorax slender, subcylindrical; propodeum moderately 



