38 



PROC. ENT. SOC. WASH., VOL. 21, NO. 2, FEB., 1919 



Moreover, the relative lengths of segments IV and V are different, 

 segment V being rather longer in betae Doan. It seems evident, 

 then, that Westwood had a different insect. 



c. 



FIG. 1 



He separated his genus from Forda Heyden on the antennae. 

 These, however, differ little from the antennae of the type species 

 of the genus, formicaria Heyden (fig. 1C), excepting in the rela- 

 tive lengths. We conclude, therefore, that betae West, is dis- 

 tinct from our American beet aphid and should be known as 

 Forda betae (West.). 



A NEW GENUS AND SPECIES OF CERAMBYCIDAE FROM COLORADO. 



(COLEO.) 



BY W. S. FISHER, U. S. Bureau of Entomology. 

 Elatotrypes, new genus. 



Body very much depressed. Maxillary palpi longer than labial pulpi 

 their last joints strongly securiform. Head small; front short and nearly 

 perpendicular; top with a narrow, deep groove between the antennae, extend- 

 ing to the dorsal median part. Mandibles stout and acute at tip. Ligula 

 membranous. Eyes finely granulated, only moderately emarginate, but 

 not embracing the base of the antennae. Antennae 11-jointed, the outer 

 joints sericeous but without distinct poriferous spaces; second joint moderately 

 long. Prothorax depressed, not tuberculate on the sides, the dorsal part with 

 callosities. Scutellum rounded behind. Elytra depressed and moderately 

 elongate. Prosternum very narrow, pointed, not extending between the o>\;n\ 



