NORIH AMERICAN COLEOPTERA. 119 



steriuiin canaliculate, antecoxal ridges distinct. Legs moderately long, tibia; 

 slender, slightly widened at the apex, apical armature prominent, except the 

 posterior tibise; tarsi very slender, first and second joints elongate, tbird rather 

 small, not broadly bilobed, less than twice as wide as the preceding, fourth joint 

 very slender and long, projecting nearly twice the length of the fourth; claws 

 moderate, connate, about one-third their length. Length 2.75 mm ; Oil inch. 



Hub. — Texas. One female specimen in Mr. Ulke's collection. 



A distinct .species, less robust than the other members of this 

 group, from all of which it is distinguished by its very slender tarsi ; 

 the scales on the upper surface are smaller than usual in this group 

 and less crowded. From S. pleuralis Cas. it appears to differ by the 

 legs not being red and its larger size. 



amcBnus Group. 



The species which 1 have inclu(U'il in this group are readily dis- 

 tinguished from those of the preceding by the fourth joint of the 

 anterior tarsi, which is scarcely longer than the third and the less 

 dense vestiture, condensed in lines or transverse bands. They are 

 easily distinguished as follows : 



First and second joints of funicle long and slender; club large, strongly elon- 

 gate; tarsi slender, first joint elongate; prothorax uot wider than long; 

 claws connate at most one-half their length. 

 Fifth interspace densely scaly ; third tarsal joint less than twice as wide as 



the preceding lineolatiiiii. 



A broad, irregular stripe of pale scales extending from humerus to the suture 

 behind the middle ; third tarsal joint nearly thrice as wide as the second. 



IriaiigiilariM. 



First and second joints of funicle elotigate, not slender; club smaller and less 



elongate; tarsi stouter, first joint not elongate; prothorax wider than 



long; claws connate beyond the middle; elytra tesselate ailioeiiuiii. 



P. liiieolaliis Casey. — Oblong-oval, black, legs, especially the tibiai red- 

 dish, tarsi black ; scales small, white, mottjed with brown, n)ore dense on ab- 

 domen and thoracic side pieces. Beak rather strongly curved, especially nearer 

 the base, not very robust; male somewhat shining and rather densely punctured, 

 thinly pubescent, a little longer than head and prothorax ; considerably longer 

 than head and prothorax, and more shining in the female; scrobes oblique; 

 basal tufts and constriction feeble. Head very finely alutaceous, front remotely 

 punctulate, scaly. Antennse very slender, inserted two-fifths {%,) or a little 

 before the middle ( 9 ). rufopicecus; first and second joints of funicle elongate 

 and slender, subequal. latter one-third longer than the third, this longer than 

 the fourth; clava elougate-ovoidal, densely pubescent. Prothorax a trifle wider 

 than long, rather broadly rounded on the sides, broadly constricted at the apex, 

 a little wider at the base than at the apex ; surface densely punctured, less so on 

 the disc before the middle, punctures variable in size, rather coarse, transversely 

 oval, a smooth discal median line, more or less distinct. Elytra one-third wider 



TKANS. AM. KNT. SOC. XXI. APKIL, 1894. 



