REVISION OF ELEODIINI BLAISDELL. 279 



Type in the LeConte collection. 



Type-locality. — San Diego, California. 



Salient ty pe -character 8. — Thora-x finely punctate, broad and greatly 

 rounded at the sides, which are subdepressed, narrowed behind ; basal 

 angles obtuse, somewhat more prominent than usual. Elytra strongly 

 convex, finely and seriately punctate, posteriorly declivous, strongly 

 attenuated, and produced (LeConte). 



Diagnostic characters. — The prothorax is usually at least one-half 

 wider than long, sides very strongly rounded and strongly con- 

 stricted at base; anterior angles acute, prominent and dentiform, but 

 generally smaller than in laticolUs.^ and frequently everted. The ely- 

 tra in the typical form are elongate and strongly produced in the 

 males, not suddenly caudate, and directed obliquely downward. 



In examples from Fort Tejon the males have the elytra distinctly 

 caudate, the cauda horizontal and formed nearly as in luco'. In the 

 other forms the elytra are less elongate and moderately produced. 

 The elytra are never sulcate, but simply with stria3 of small punc- 

 tures that are at times rather coarse and rarely impressed. 



The elytral surface is never murlcate^ and is in this character sepa- 

 rated from laticollis^ the latter having the pronotum more strongly 

 punctate, duller, and rather broadly imj^ressed and granulate later- 

 ally ; in aciit'icaiida the pronotum is narrowly or not at all impressed 

 nor granulate laterallv. 



From dentipes it must be separated by the form of the pronotum. 

 In acuticauda the sides of the pronotum are more strongly and less 

 broadly arcuate and the constriction is more rapidly formed and 

 larger; in dentipes the sides of the pronotum are less strongly and 

 more broadly arcuate, tlie sinuation is shorter and more gradually 

 formed. In some examples of acuticauda the pronotinn is not Avider 

 than in dentipes., and these are the difficult specimens to place, but 

 the form of the arcuation still remains the same, and a quick eye can 

 readily catch the difference. 



In form.a typica the males may have the hind tibiae arcuate in basal 

 half and more or less gradually thickened apically. 



General ohserratlo/is. — The middle lobe of the mentum is moder- 

 ate and rather wide, subparabolic, sometimes subtrapezoidal in out- 

 line, the apex is seldom truncate; surface slightly convex centrally 

 and more or less feebly foveate lateral!}^ within the margin. 



The prosternum is variable, usually convex or horizontal between 

 the coxa? and with a moderate mucro behind ; rarely rounded or sub- 

 triHicate behind. The nuicro may be horizontal or deflexed. 



Mesosteriuun is more or less oblique and concave. 



The abdominal process is quite quadrate and in width equal to the 

 length of the third segment ; the post-coxal part of the first segment 



