AMERICAN COLEOPTERA. 29 



This species may be distinguished from puncticolh's by its smaller 

 size, more robust form, different elytral sculpture and by the smooth 

 abdomen. 



Two specimens were collected by Mr. Crotch, at San Diego. Cal. 



S. hispidula, n. sp. — Form robust, pieeous black, moderately shining, 

 sparsely clothed with moderately long yellowish hairs. Head coarsely, densely 

 and sub-strigosely punctured, middle lobe of elypeus rounded in front. Tho- 

 rax twice as wide as long, anterior angles acute and very prdin inent anteriorly, 

 base slightly wider than apex, at middle slightly arcuate, on each si<le 

 feebly sinuate, hind angles rectangular; sides very feebly arcuate, disc very 

 convex with ante-basal transverse impression; surface coarsely, deeply and 

 rather densely punctured, punctures becoming slightly strigose at the sides. 

 Elytra broadly oval, very convex, moderately coarsely but not densely punc- 

 tured, punctures with faint tendency to a seriate arrangement. Thorax be- 

 neath very coarsely, deeply and rather densely punctured, mesosternum less 

 coarsely punctured, metasternum with very large, deep punctures, abdomen 

 moderately densely punctured. Outer margin of anterior tibiae slightly spiuu- 

 lose. Length .22 inch; 5.5 mm. 



The appearance of this species is somewhat that of Trinrophua. It 

 may be at once known by its form, the very prominent anterior angles 

 of the thorax, and the sparsely hairy surface. 



One specimen collected by Dr. Edw. Palmer, in Utah. 



Besides the differences indicated in the table between this genus 

 and Triphalm (the longer hind tarsi), it will be observed that the 

 tarsi have coarser and sparser vestiture, and the elytra much narrower 

 epipleurae. The sexual character above indicated in S. ovipennis ap- 

 pears to be unique in the species of the tribe in our fauna. In form 

 the species more closely resemble Triorophus, but this has the vestiture 

 of the tarsi spinous beneath, the epistoma with much longer middle 

 lobe which is narrowed at base and clasped by the basal tooth of the 

 mandibles. 



The three species forming the genus are related as follows : — 



Elytra oblong, punctures larger, arranged in regular striae. 



Thorax moderately emarginate in front, angles not prominent. 



puncticollis. 

 Elytra broadly oval, punctures very irregularly-arranged. 



Thorax moderately emarginate, angles not prominent ovipennis. 



Thorax deeply emarginate in front, anterior angles very acute and promi- 

 nent, disc with ante-basal transverse impression lii!>ipi<lul£i. 



The tribe Grnathosiini, as at pi-eseut constituted, appears to consist 

 of material entirely too heterogeneous to be associated together. 6Va- 

 niotus cannot form part of the tribe for the following reasons. The 

 metasternal episterna are broad, in fact nearly as wide as long, and 



