170 H. C. FALL. 



the outer rows regular and more deeply impressed, the sutural ones confused. 

 The first tarsal joint is equal in length to the next three; the fourth joint is 

 deeply emarginate ahove for the reception of the fifth, the third less deeply so. 

 Length 5-6 mm. 



Virginia. The only specimen before me is a male from the 

 Hubbard and Schwarz collection. LeConte's types were also from 

 Virginia. 



PTIXODES LeConte. 



This genus was established by LeConte for a species taken by 

 himself at San Diego, California, the unique type of which has 

 never to my knowledge been duplicated. The insect looks much 

 like a small somewhat aberrant Trichodesma, and except for the 

 dark discal area of beyeri, the similarity to small examples of the 

 latter is rather marked. I give below the original diagnosis of 

 LeConte : 



" Body elongate, convex, pubescent and clothed with long erect hairs. Pro- 

 thorax excavated heneath for the reception of the head, disk gibbous, not chan- 

 neled. Eyes convex, moderate in size, prominent. Antennae rather stout, joints 

 3-8 nearly equal, the outer ones slightly transverse; ninth and tenth each longer 

 than the three preceding, and somewhat wider, oblong; eleventh a little longer, 

 oval ; the ninth to eleventh somewhat longer than all the preceding united. Pro- 

 thorax narrowed behind, not contiguous to the trunk ; presternum obtusely trun- 

 cate behind, separating widely the anterior coxae, which are conical and promi- 

 nent; middle, coxae prominent, well separated by the mesosternum, which is 

 truncate (?) behind; metasternum not sulcate ; hind coxae with the plates very 

 narrow, scarcely visible. Abdomen with the ventral segments smooth, sparsely 

 hairy, not connate, the fourth shorter than the others, which are equal. Thighs 

 strongly clavate; tibiae not compressed, with external rows of long hairs; tarsi 

 shorter than the tibiae, stout, first joint very slightly elongated, fifth joint dilated, 

 claws broadly dilated at base." 



Dismissing LeConte's remark concerning the contiguity of the 

 prothorax to the trunk as of really no significance, an analysis of 

 the above description shows very little on which to base a separa- 

 tion from Trichodesma; but for the present it seems best to retain 

 the genus, depending upon the somewhat more strongly clavate 

 femora; the ventral segments of more uniform length, except the 

 fourth ; and the narrower hind coxal plates. 1 have observed also 

 that the antennal club is relatively longer than in Trichodesma. 



The following brief description was made of the type during a 

 recent visit to the Cambridge Museum : 



