H. F. WICKHAM 259 



covered by the legs (which are not shown in the sketch) the exposed por- 

 tions closely, moderately finely and not deeply punctate. Legs short, 

 none of them verj^ well preserved. Length, from front of head to elytral 

 apex, 5 mm. 



Described from one specimen, with counterpart, found by myself 

 on the Wilson Ranch near Florissant, Colorado. The type is in 

 my collection. 



This is the third species assigned to Lithocoryne. All of them 

 have the same type of antenna and agree in size and general form. 

 They may be separated by the subjoined table. 



Prothorax broadest anteriorly, sides nearly- straight from near 



the front angles to the base gravis Scudder 



Prothorax with side margins strongly, regularly arcuate 



arcuata Wickham 

 Prothorax broadest at base, side margins slightly arcuate 



color adensis n. sp. 



Gorticaria aeterna sp. nov. (Plate V, fig. 4.) 



Form of the usual type of the genus except that the prothorax is wider 

 than normal. Head onlj^ moderately prominent, eyes large, surface be- 

 tween them minutely closely punctured. Prothorax twice as wide as long, 

 broadest near the base, sides almost regularly arcuate, surface relatively 

 coarsely and extremely closely punctured. Elytra nearly four and one-half 

 times the prothoracic length, punctuation confused, similar to that of 

 the prothorax but a little finer, (more especially apically), and less close. 

 Length, to abdominal apex, 2.90 mm.; to elytral tip, 2.65 mm. 



Described from one specimen, with counterpart, collected by 

 myself on the Wilson Ranch, near Florissant, Colorado. The 

 type is in my collection. 



Distinguished from all the other Florissant forms assigned to 

 this genus bj^ its size and the relative proportions of the pro- 

 thorax and elj'tra. It is larger than most of the modern species 

 but is surpassed in this respect bj' some of them. 



Pactopus americanus sp. nov. (Plate VI, fig. 10.) 



Form rather stout for this family, broadest across the neighborhood of 

 the humeri, well tapering posteriorly. Head finely but roughly punctate 

 on the small portion of the front that can be seen. Eye not definable ex- 

 cept a small portion which shows above the antenna and is rather coarsely 

 facetted. Antennae well separated at base, first joint nearly twice as long 

 as wide, second and third a little longer than any one of the five succeed- 

 ing, which are subequal to each other, ninth, tenth and eleventh much 

 longer, forming an obscure club. Prothorax strongly cribrately punctured 



TRA.NS. AM. ENT. SOC, XL. 



