50 



BULLETIN 108, UNITED STATES NATIONAL MUSEUM. 



Soldier. — ^Head about on the same proportions as in R. jlavipes, 

 about one and one-half times as long as broad, the sides nearly 

 parallel, not broader in front, of a rather dull brownish yellow; 

 ©cellar spot usually faintly visible; mandibles about as long as width 

 of the head; pronotum much narrower than head, slightly emarginate 



/ 



f 



Fig. 35.— Contrasting VIEWS OF GULA (VENTRAL), l. Gula. 2. Gena. 3. Hy- 



POSTOMA. (a) ReTICTTLITEEMES FLAVIPES. (6) RETICXnjTEEMES TIBIALIS. 



Greatly enlarged. 



in middle of front; cerci and stylets rather smaller than in R. Jlavipes. 



On the under surface of the head the gula is plainly wider than in 



the other species, in the narrowest part it is about one-half as wide 



as m the front. (Figs. 35, h and 34, 1.) 

 Common through much of the west, being recorded from as far 



east as Iowa City (Johnson County), Iowa and Cass (Franklin County), 



Arkansas. The State re- 

 cords are Nebraska, Kan- 

 sas, Oklahoma, Texas, 

 New Mexico, Arizona, 

 Colorado, Nevada, Utah, 

 Idaho, Montana, and 

 California. (Fig. 36.) 



Type, winged adult. — 

 Cat." No. 21861, U.S.N.M. 



RETICULITERMES HESPERUS, 



!^ new species. 



Wing ed. — Brown, 

 about as in R. Jlavipes. 

 The tibiae are often a 

 trifle darkened, but not 

 as black as in R. tihialis; the anal area usually shows a paler 

 yellowish spot, more prominent than in R. tibialis. The wings 

 are distinctly darkened, fully as dark as in R. Jlavipes; antennae 

 and palpi dark. The ocelli are close to eyes, less than a diam- 

 eter distant. Pronotum smaller and narrower than R. Jlavipes. 



rr'^^^S. 



Fig. 36.— Distribution of eeticulitermes tibialis. 



