380 U. S. NATIONAL MUSEUM BULLETIN 216 



Champlain. 9, " 'Abies concolor," Austin, Oreg., June 24, 1914, W. J. 

 Chamberlin. 



This species occurs in the Transition and Canadian zones of 

 western Northern America. It is adult from mid- June to early August. 

 It has been reared from coniferous trees. 



2. Poemenia albipes (Cresson) 



Ephialtes albipes Cresson, 1870, Trans. Amer. Ent. Soc, vol. 3, p. 143; 9 . 

 Type: 9 , New Jersey (Philadelphia). 



Male: Front wing 4.2 to 6.8 mm. long; punctation of head and 

 body fine; hind ocellus separated from eye by about 1.1 its long 

 diameter; flagellum with 27 to 31 segments, with rather broadly 

 elliptic tyloids on segments 6 to 8; areolet present or rarely absent; 

 first tergite 2.8 to 3.5 as long as wide; first sternite about 0.70 as 

 long as its tergite. 



Colored like the male of P. thoracica except that the scape and 

 pedicel are about 65 percent white, only about 35 percent of their 

 area (on the upper and inner sides) being brown. 



Female: Front wing 4 to 8.5 mm. long; lateral ocelli separated 

 from each other by 0.8 their diameter, separated from eye by 1.1 to 

 1.3 their diameter; face densely punctate, the punctures separated by 

 0.5 to 1.5 their diameter; vertex finely, sparsely punctate, the punc- 

 tures separated by 2 to 3 times their diameter ; temple slightly scabrous 

 from top of eye down 0.4 the distance to mandible; flagellum with 

 27 to 35 segments; pronotal trough smooth and highly polished; 

 mesoscutum and propodeum densely coarsely punctate, the punctures 

 separated by about 0.3 their diameter, the sculpture of propodeum 

 tending toward transverse rugosity; areolet present; first tergite about 

 2.8 as long as wide; first sternite about 0.66 as long as its tergite; 

 second tergite 1.15 to 1.75 as long as wide; abdominal segments 2 to 5 

 with one pair of ventral scleromes, these extending 0.70 to 0.85 the 

 lengths of their segments; thyridia round or a little oval; first tergite 

 densely punctate, the punctures separated by about 0.3 their diameter; 

 second and following tergites gradually less densely punctate, the 

 punctures on the sixth tergite separated by about twice their diameter; 

 ovipositor sheath about 1.05 as long as front wing. 



Black. Apical half of clypeus and most of mandible stained with 

 ferruginous; palpi white; scape and pedicel white on the outer front 

 half; flagellum brown ventrolateral^ toward base; narrow stripe 

 along lower edge of pronotum, more or less of lower part of propleurum, 

 extreme apex of pronotum, tegula, and trochanters, white; thorax 

 nearly always black but sometimes more or less ferruginous in speci- 

 mens from western United States; front coxa white, its base tinged 

 with fulvous; middle coxa fulvous, white apically; front and middle 



