144 
Psyche 
[December 
Diplotaxis cartwrighti Cazier, new species 
Medium sized, dark reddish-brown; upper surface glab- 
rous ; labrum broadly, arcuately emarginate ; mentum feebly 
oblique behind, strongly declivous for anterior half, declivity 
concave from side to side, without raised line ; thoracic angles 
not impressed ; hind femora nearly impunctate between the 
submarginal rows of setigerous punctures; tooth of tarsal 
claws ante-median. 
Head with punctures above separated by about their own 
widths, more densely placed below, front nearly on same 
plane as clypeus ; clypeus densely punctate punctures sepa- 
rated by about one-fourth to one-half their own widths, cly- 
peal suture entire, anterior margin rather deeply sinuate 
medially, lateral margins shallowly sinuate medially, mar- 
gins shallowly reflexed. Pronotum shining, convex, widest 
at middle, sides evenly rounded from base to apex, anterior 
angles not prominent ; anterior margin narrower than basal 
margin ; disk with punctures separated by two to three times 
their own widths. Elytra widest about middle, humeral and 
apical umbones prominent ; surface opaque, sericeous ; costae 
faint but evident, intercostal spaces irregularly punctate, 
punctures separated by about twice their own widths. Un- 
dersurface sparsely clothed with short golden pile ; anterior 
tibiae tridentate, basal tooth slightly ante-median, posterior 
tarsi equal in length with tibiae, inner tooth of tarsal claws 
truncate, ante-median in position. Length 11 mm., width 
6 mm. 
Holotype in the writer’s collection, taken at Tanque de 
Malone La Babia, Coahuila, Mexico, June 20, 1938, by Rollin 
H. Baker. One paratype from Serranias del Burro, Coa- 
huila, Mexico, June 18, 1938 (Rollin H. Baker) in the collec- 
tion of 0. L. Cartwright. The writer is pleased to name this 
species in honor of Mr. Cartwright who made available much 
of the material herein described. 
The paratype specimen has the elytra shining and much 
less alutaceous than the type. Otherwise, they are similar. 
This species is most closely related to Diplotaxis stabilis 
Cazier but can be distinguished from it by its smaller size, 
convex pronotum, alutaceous elytral sculpturing and longer 
tarsi. 
