268 071 Some New 



second. Prothorax one-half wider than long, but slightly wider than 

 the head, slightly shorter than the head and beak, cylindrical ; base and 

 apex equal, truncate ; sides broadly and rather strongly arcuate ; disk 

 finely, feebly, and not densely punctate, the punctures entirely con- 

 cealed by a dense mass of scales, with small, short, erect scales inter- 

 mingled. Elytra broadly emarginate at base, oblong, one-half longer 

 than wide ; sides nearly straight and parallel, broadly rounded behind, 

 three-fourths wider than and nearly three times as long as the pro- 

 thorax, finely, feebly striate ; striae coarsely and rather distantly punc- 

 tate, the punctures and suture almost completely concealed by the sur- 

 face vestiture ; intervals nearly flat, each with an unevenly double row 

 of small erect brown scales. First ventral suture broadly and rather 

 strongly arcuate ; second segment as long as the next two together ; 

 third and fourth subequai ; fifth semicircularly rounded behind. Legs 

 densely squamose, and with short semi-erect scales. Metasternal epi- 

 sternum narrow; suture very deep anteriorly, becoming almost obsolete 

 posteriorly. Length 4.4 mm. 



Nevada (Washoe Co. 1). 



The groove surrounding the eye is narrow and not very deep ; 

 it is obsolete behind the eye. This species differs from squalens 

 Horn in its more oblong form, more transverse prothorax, and 

 more robust or squamose and paler setas. 



A considerable number of new genera of Periteli having been 

 defined, it may, perhaps, be well to more fully explain their 

 position with regard to those already described ; the following 

 table is therefore appended, this being an enlargement of the 

 one given by Dr. Horn (Proc. Am. Phil. Soc, XV., p. 65): — 



First abdominal suture straight or extremely nearly so. 



Scrobes lateral. . Paraptoclius 



Scrobes superior. 

 Antennal scape not attaining the prothorax ; eyes small ; second 

 ventral segment shorter than the two following together, 



Slenoptoclius 

 Antennal scape long and slender, passing distinctly beyond the an- 

 terior margin of the prothorax ; eyes large ; second segment as 



long as the two following together Orthoptochus 



First abdominal suture arcuate. 



Cotyloid surface of the hind tibiae glabrous ; eyes with or without 

 orbital groove. 



Integuments sparsely pubescent ]IIylacu» 



Integuments squamose. 

 Scrobes superior and convergent above. 

 Beak narrowed to tip. 



