14 
KEY TO THE GENERA OF THE 
LEPTURINI OF AMERICA NORTH OF MEXICO 
The Tribe Lepturini 1 (Family Cerambycidae) 
This group is separated from the rest of the Cerambycid* by the 
following characters: forecoxse conical; base of antenna* not enveloped 
by the eyes; mandibles acute and fringed on the inner margin; elytra not 
abbreviated, 
A Prosternum broadly excavated across the middle, pronotum spinose to subtuberculate 
on the sides; first segment of the hind tarsi with a pubescent sole beneath. 
B Front of head vertical, front and vertex meeting at an angle of nearly 90 degrees. 
G Tarsi stout, hind tarsus with 2nd segment not longer than 3rd; intercoxal 
piece of prosternum strongly elevated, width moderate. Pyrotrichus Lee. 
CC Tarsi slender, hind tarsus with 2nd segment longer than 3rd; intercoxal piece 
ofprostemum feebly elevated and very narrow. 
D Hind tarsus with 1st segment pubescent on the sides beneath, middle line 
glabrous; cheeks moderate, length between eye and base of mandible 
about one-half diameter of eye; palpi lone and slender. Lepialia Lee. 
DD Hind tarsus with 1st segment pubescent beneath throughout; cheeks 
much shorter than half diameter of eyes; palpi short and stout. 
Encyclops Newm. 
BB Front of head oblique, meeting vertex at an angle of much more than 90 degrees. 
C Tibial spurs not terminal. Toxotus Dej. 
(Stenocorus Fab.) 
CG Tibial spurs terminal. 
D Hind wings with a closed cell in the anal region. 
E Antennae short, segments 5 to 11 much stouter than 1 to 4; elytra 
strongly costate. Stenocorus Geoff. 
( Rhagium Fabr.) 
EE Antennae usually slender, distal segments but little stouter than the 
others, 
F Eyes coarsely granulated. 
G Eyes large, prominent. Centrodera Lec. a 
GG Eyes of moderate size. Xylosteus F: v. 
FF Eyes finely granulated. 
G Pronotum with sides distinctly tuberculate. 
H Eyes large, emarginate. 
I Third segment of hind tarsus cleft to the base. 
Anthophilax Lee. 
II Third segment of hind tarsus cleft approximately to the 
middle. Pachyta Dej. 
HH Eyes small, entire. Piodes Lee. 
GG Pronotum with sides obtusely rounded at the middle. 
Leptacmaeops Csy.® 
HD Hind wings without a closed cell in the anal region. 
E Pronotum with sides strongly tuberculate; antennae short and stout. 
Pseudopachyta n. gen. 
EE Pronotum with sides obtusely rounded or feebly tuberculate in front of 
the middle. 
F Metepisternum broad at base with sides converging behind. 
G Eyes distinctly emarginate. Evodinus Lee. 
GG Eyes entire. 
H Pronotum and elytra polished, feebly punctate, almost 
devoid of pubescence. Oaumtes Lee. 
HH Pronot u m ana elytra closely strongly punctate and distinctly 
pubescent. Acmaeops Lee. 
1 Including the Encyclopini and Lepturini of Leconte, 
* The genus Centrodera Lee. is doubtfully distinct from Xylostem Friv. 
* Leptacmaeops Csy. is probably synonymous with Coriodera Muls. of Europe. The Europea 
material before us is insufficient to enable us to form a definite conclusion. 
