KEVISION OF NEARCTIC TERMITES. 



51 



The last ventral segment of female is proportionally longer than in 

 R. tibialis. 



Length to tip of wings, 8-9 mm. 



Soldier. — Head from nearly twice as long as broad to much more 

 than twice as long as broad; about as broad as in R. jiavipes, but 

 nearly one-third longer; color as in other species. Pronotum 

 slightly emarginate in front in middle, narrowed behind; gula fully 

 two and a half times as broad in front as at the narrowest part. 

 (Fig. 34, 2.) 



Occurs from southern California (Campo, along the boundary line 

 of lower California), north through Oregon to Washington (Spokane), 

 east to Nevada (Elko). (Fig. 37.) 



Tyfe, winged adult.— Cat. No. 21864, U.S.N.M. 



RETICULITERMES HUMILIS, new species. 



Winged. — Closely similar to R. tibialis; tibiae more or less infus- 

 cated, the antennae and palpi marked with dark; the ocelli a little 

 less than its diameter from eye, the 

 eye hardly its diameter from the 

 lower margin of head; the head is 

 a trifle shorter, and the pronotum 

 a little more narrowed behind than 

 in R. tibialis, and the whole insect 

 is a little smaller than that species; 

 the wings are slightl}' grayish, the 

 color of the body paler than R. tibia- 

 lis, and the head especially brown. 



Length to tip of wings, scarcelv 9 

 mm. 



Soldier. — Smaller and with more 

 slender head than R. flavipes. Head 

 about twice as long as broad, sides 

 parallel, with more numerous erect 

 hairs than usual; mandibles as long 

 as width of head; gula slender, more 

 than twice as wide in front as at 

 narrowest part; the ocellus-like spot 

 above base of antenna very distinct; 

 the labrum is hardl.y as pointed at tip as in R. flavipes. The prono- 

 tum about as long as usual, but a trifle more narrowed behind, deeply 

 notched in front. The femora appear slightly more swollen than in R. 

 flavipes. In general it is very close to R. hesperus, but the soldier has 

 less elongate head, more hairy above; the imago has the tibiae darker; 

 anal area less pale, and the last ventral segment of male not so long. 

 (Fig. 38, L) 



Fig. 37.— Distribution of Reticulitermes 

 hesperus. 



