Pomona College Journal of Entomoluoy 



775 



and is as long or a little longer than IV and V together; IV and V are usually 

 co-e(|ual, hut either one may he longer than the other. The iiieasurenients of 

 the articles IV, V and VI of four antennse are as follows : 



The sixth article is usually the shorte.st of the last three. The spur of VI 

 is equal to about one-si.\th of the length of the entire article. Large circular 



Figure 245. Tuberolachnus viminalis (Fonsc.) Mordwilko 

 A, winged viviparous female; B, cornicle: C, tarsi; D and E, antennae of the same. 



