186 NORTH AMERICAN 



tennae scarcely paler except toward base where they are slightly piceons ; 

 pubescence above rather fine, short and sparse, recumbent, dark fulvous, 

 more conspicuous beneath, cinereous. Head distinctly wider than long; 

 anterior angles very broadly rounded ; apical margin narrowly and feebly 

 sinuate ; eyes small ; surface feebly convex, rather coarsely densely deeply 

 and sliglitly confusedly punctate, punctures slightly elongate ; antennae as 

 long as the pronotum, rather slender, slightly geniculate, outer joints dis- 

 tinctly compressed, second one-half as long as the tliird and three-fourths as 

 long as the fourth, about as long as wide, seventh sub-globular, eightli 

 slightly wider than long, ninth still wider, ninth and tenth equal in width, 

 eleventh slightly narrower, conoidal, very slightly longer than wide, joints 

 four to nine sub-equal in leiifitb ; labrum very short and transverse, rather 

 deeply sinuate anteriorly. Prothorax widest at the middle where it is about 

 one-lialf wider than long ; sides evenly and feebly arcuate ; apex slightly 

 shorter than the base, broadly and feebly emarginate, angles from above 

 right and slightly rounded ; base broadly arcuate in the middle, distinctly 

 sinuate near the basal angles which are right and very slightly rounded ; 

 disk broadly convex, narrowly and acutely margined at the sides and along 

 the base, coarsely deeply very densely and nearly evenly punctate ; ijunc- 

 tures perforate, elongated, interspaces nearly flat, very minutely granulo- 

 reticulate. Elytra at base as wide as the pronotum, slightly wider at two- 

 thirds the length from the base ; together thence gradually and acutely 

 rounded behind; sides very feebly arcuate anteriorly; disk about twice as 

 long as the head and prothorax together, coarsely striate ; striae feebly im- 

 pressed, punctate: punctures round, rather fine, feebly impressed, distant 

 in the rows by nearly twice their widths, intervals feebly convex, finely and 

 feebly ruguloso-punctulate, moderately shining. Under surface finely and 

 sparsely punctate ; prosternum deeply and very densely punctate, scabrous, 

 side-pieces very densely and longitudinally rugulose ; first three ventral 

 segments decreasing very gradually in length, fourth shorter ; sutures be- 

 tween the last three segments very deeply impressed. Legs rather slender ; 

 first joint of the posterior tarsi longer than the next two together. Length 

 4.7-5.0 mm. 



Arizona (Morrison), n. 



Tiie jtubescent'e of the elytra is rather coarser ami more conspicu- 

 ous tlian that ol" tlie lieail and pronotum. In general form this species 

 reseml)h's piilreriilentns Mann., being only a little shorter and more 

 robust ; it diflers from that species in its rougher and more dense 

 sculpture and especially in the form of the pronotal punctures, wiiich 

 are circular in pulverulenfus, and in its very much deeper and d<'nser 

 rugulosity of the prosternal side-pieces; it should probably follow that 

 species in the catalogue. 



MORDELI.A Linn. 



M, deserta n. sp. — Form rather robust: sides nearly parallel. Pubes- 

 cence very coarse, close, recumbent and sericeous, setiform, very pale fulvo- 



