214 MISC. PUBLICATION 470, U. S. D'EPT. OF AGRICULTURE 



Male.— Elongate, slightly convex above, moderately shining, dark bronzy 

 brown, with a slight violaceous reflection ; beneath piceous, with a faint bluish 

 tinge, the tips of the middle femora, apical halves of posterior femora, and 

 basal halves of posterior tibiae bright coppery red. 



Head coppery red on occiput and vertex, becoming green on front, with a 

 narrow, longitudinal groove on occiput, and on each side of front an oblique 

 smooth spot, above which is a broad chevron; front slightly convex; surface 

 coarsely, shallowly, irregularly punctate, more or less rugose behind clypeus, 

 sparsely clothed with long, recumbent, white hairs, intervals densely, finely 

 granulose ; clypeus broadly, deeply, arcuately emarginate in front, * broadly 

 rounded on each side. Antenna uniformly piceous, with a faint cupreous tinge, 

 slightly narrowed to apex; intermediate segments wider than long, subtriangu- 

 lar, broadly rounded at outer margins; third segment slightly longer than 

 fourth. 



Pronotum three-fourths wider than long, distinctly wider at apex than at 

 base, widest near apex; sides slightly rounded at apex, strongly, arcuately 

 converging from near apex to posterior angles; anterior margin moderately 

 sinuate, with a broadly rounded median lobe ; base deeply, arcuately emarginate 

 on each side, median lobe strongly produced, and subtruncate in front of 

 scutellum ; disk uniformly convex, without depressions or callosities ; surface 

 glabrous, densely, deeply, uniformly punctate, punctures separated by about 

 their own diameter, more or less rugose at sides, intervals finely, densely 

 granulose. 



Elytra at base distinctly wider than pronotum, twice as long as wide; sides 

 nearly parallel from humeral angles to apical third (slightly expanded behind 

 middle), then arcuately converging to tips, which are separately narrowly 

 rounded; lateral margins coarsely serrate; basal depressions broad and mod- 

 erately deep ; humeral depressions very shallow ; surface glabrous, slightly 

 uneven, punctures similar to those on pronotum, without distinct discal foveae, 

 but each elytron with a vague longitudinal costa on apical half near sutural 

 margin. 



Abdomen beneath coarsely, densely, deeply punctate, smooth along anterior 

 and posterior margins of sternites, densely clothed with long, recumbent, white 

 hairs except at middle, without lateral callosities, intervals densely granulose; 

 last visible sternite broadly, shallowly, arcuately emarginate and coarsely dentate 

 at apex, without a submarginal ridge, lateral margins slightly serrate; eighth 

 tergite sparsely, coarsely punctate, densely granulose, not longitudinally carin- 

 ate, lower margin broadly rounded at apex, upper margin deeply, narrowly, 

 angularly emarginate at apex. Prosternum densely, coarsely punctate, sparsely 

 clothed with moderately long, recumbent, white hairs, and with a distinct, broad, 

 moderately long, median lobe in front. Anterior femur with a large, acute tooth, 

 which is strongly dentate on outer margin.. Anterior tibia slightly arcuate, 

 with a small rounded dilation at apex ; middle and posterior tibiae straight. 



Length 5 mm., width 1.75 mm. 



Kedescribed from the male type in the collection of H. C. Fall. 



Female. — The two sexes are very much alike, but the female differs from the 

 male in having the last visible sternite longer and broadly rounded at the 

 apex, the eighth tergite broadly rounded at the apex, and the anterior tibia 

 nearly straight and unarmed at the apex. 



Type locality. — Arizona, no definite locality. 



DISTRIBUTION 



From material examined: 

 Arizona: Hot Springs, June 24-28 (Barber and Schwarz). 



Host. — Unknown. 



No variation worthy of note has been observed in the small series 

 of specimens examined except in length, which ranges from 4 to 

 6.5 mm. In well-preserved specimens the surface at the sides of the 

 abdomen is nearly concealed by the white efflorescence. 



Fall (1907) had two males before him when he described the 

 species, one from Hot Springs. Ariz., and the other from Arizona 



