168 U. S. NATIONAL MUSEUM BULLETIN 216 



below, and undescribed species from Germany and the mountains of 

 South India. 



Stethoncus arcticus, new species 



Figure 177,a 



Front wing 3.5 to 4.2 mm. long; flagellum with about 24 segments, 

 the median segments about 1.4 as long as wide in male, about 0.58 

 as long as wide. in female; transverse carina across top of face faintly 

 up-bowed; punctures on mesopleurum small and rather weak, their 

 interspaces about 3.5 times their diameter; metapleurum with band 

 of hairs along its upper margin, the hair band rather wide and irregular 

 in male, very narrow in female; punctures on second abdominal 

 tergite very fine and weak, their interspaces about 3.5 times their 

 diameter. 



Black. Flagellum blackish brown; tegula brown; legs brownish 

 fulvous, the middle and hind coxae blackish brown. The legs of the 

 female are darker than in the male, the femora being reddish brown. 



An undescribed species from the mountains of South India is very 

 similar to this one but has all coxae fulvous and the transverse carina 

 across the top of the face rather strongly up-bowed. 



Type: d\ Fort Chimo, Labrador, July 22, L. M. Turner (Wash- 

 ington, USNM 63643). 



Paratypes: 9, Mount McKinley at 2,600 ft., Alaska, Aug. 15, 1954, 

 D. Townes (Townes). 4 cT, same data as type (Washington and 

 Townes). cT, Nain, Labrador, Aug. 17, 1908, Owen Bryant (Wash- 

 ington), cf , Ungava Bay, Labrador, July 22, L. M. Turner (Wash- 

 ington), tf, 9, Churchill, Man., July 29 and Aug. 1, 1937, W. J. 

 Brown (Ottawa). cf, Tuckermans Ravine, Mount Washington. 

 N. H., Aug. 24, 1951, H. and D. Townes (Townes). 



This is an Arctic species. 



20. Synosis, new genus 



Figure 175,b 



Front wing 3.3 to 5.5 mm. long; punctures on body of moderate 

 size; combined face and clypeus more strongly convex transversely 

 than vertically, upper margin of face produced upward a little between 

 the antennal sockets, the point of process truncate or weakly retuse; 

 temple strongly convex; head in profile with an almost vertical, 

 weakly rounded slope from hind margin of hind ocelli to point usually 

 occupied by occipital carina; occipital carina entirely absent; cheek 

 about 1.0 as long as basal width of mandible; mandible of moderate 

 size, tapered apically, its lower tooth smaller than upper tooth; 

 labrum projecting a little beyond margin of clypeus; flagellum of 

 moderate length, filiform ; upper margin of pronotum a little thickened, 

 with a faint submarginal groove ; propleurum weakly convex ; scutellum 



