DESCRIPTIONS OP NEW SPECIES. 235 



Elytra mottled, with lines of tessellated black and white ; a white spot 

 near the apex, with a quadrate black spot in front of it. 



1. VARIEGATUS Hald. 



B. Elytra with a common fuscous cloud angulated at the suture ; 

 Elytra scarcely mottled, apex slightly obliquely narrowed and feebly 



prolonged, angle of fuscous spot acute. 2. ALPHA Say. 



Elytra more distinctly mottled, apex more obliquely prolonged, angle 



of fuscous spot acute. 3. CINEREUS Lee. 



Elytra more distinctly mottled, apex less prolonged, angle of fuscous 



blotch obtuse, margined before and behind with whitish pubescence. 



4. XANTHOXYLI Shimer. 



C. Elytra without angular blotch behind the middle , smaller species ; 

 Elytra mottled with small black points, an indistinct transverse white 



band behind the middle. 5. PUNCTATUS Hald. 



Broader, elytra sparsely mottled with black points, without white band, 



lateral tubercle more acute. 6. CRASSULUS n. sp. 



D. Thoracic spine nearer the base, elytra and prothorax with lines of 



fulvous and fuscous pubescence. 7. HALDEMANI Lee. 



L. ruisellus and rusticus Lee., 1. c. seem to be individual va- 

 riations of S. alpha. 



563. S. crassulus. Fusco-pideus, pube brevi cinerea dense vestitus 

 prothorace lougitudiue plus duplo latiore, guttis 3 fuscis signato, spinis 

 lateralibus acutis ; elytris punctis parcis nigris triseriatim digestis, ne- 

 bula laterali, liueaque transversa mox pone medium fuscis, apice rotun- 

 datis, baud prolongatis, vix truncatis. Long. 6 mm. 



One specimen ; Cape San Lucas, Lower California ; Mr. Xan- 

 tus. The antennae are annulated, a little longer than the body. 

 This species is more robust than the others, resembling a Lep- 

 tostylus, from which it is immediately distinguished by the acute 

 thoracic spines, and the 1st joint of hind tarsi equal to two fol- 

 lowing united. 



EUTESSUS LEC. 



This new genus is established upon a singular species from 

 Lower California, of which only males are known to me. It is 

 elongate in form, resembling in proportion the common Graphi- 

 surus fasciatus, but the prothoracic lateral spines are very near 

 (about one-fifth of the length from) the base, as in Liopus ; in 

 front of the angle of the spines, the sides are straight and converge 

 slightly ; the base and apex are rectilinear. The elytra are elon- 

 gate parallel, somewhat compressed at the sides, obliquely trun- 

 cate inwards at the tip ; they have several rows of distant small 



