1940] New North American Diplotaxis 145 
Diplotaxis stabilis Cazier, new species 
Large, dark reddish-brown ; upper surface glabrous ; lab- 
rum broadly, arcuately emarginate; mentum feebly oblique 
posteriorly, strongly concave from middle to front, without 
trace of transverse ridge, setse absent ; pronotal angles not 
impressed ; hind femora nearly impunctate between the sub- 
marginal rows of setigerous punctures ; tooth of tarsal claws 
post median. 
Head irregularly punctate, dense medially and toward cly- 
peus, area immediately posterior to clypeal suture more 
sparsely punctate, front on same plane as clypeus; clypeus 
densely punctate, punctures separated by about one-half 
their own widths or less, clypeal suture entire, anterior and 
lateral margins moderately reflexed, shallowly sinuate medi- 
ally, anterior angles evenly rounded, canthi subangulate. 
Pronotum with side margins evenly rounded from base to 
apex, widest just back of middle, anterior angles somewhat 
prominent, not impressed behind ; disk with punctures sepa- 
rated by about twice their own widths, interspaces minutely 
punctate. Elytra widest at about apical third, humeral and 
apical umbones prominent ; surface shining, costae rather flat 
but distinct, intercostal spaces irregularly punctate, punc- 
tures separated by two to three times their own widths. 
Undersurface sparsely clothed with short golden pile; ante- 
rior tibiae tridentate, basal tooth slightly in front of middle, 
posterior femora with few minute punctures between the 
submarginal rows of setigerous punctures, hind coxae 
sparsely punctate in outer half, hind tarsi shorter than tibiae, 
tarsal claws with inner tooth strongly truncate, ante-median 
in position. Length 12.5 mm., width 6.8 mm. 
Holotype in the writer’s collection, taken at Mesa de la En- 
contada, Sierra de la Encontada, Elevation 7000 feet, Coa- 
huila, Mexico, July 21, 1988 by Rollin H. Baker. 
Most closely allied to Diplotaxis belfragei Fall but dis- 
tinguishable from it by its less angulate side pronotal mar- 
gins, smaller punctures throughout, shorter tarsi and by the 
more ante-median tooth of the tarsal claws. 
