NORTH OF MEXICO. 



'277 



externally. Anterior tibise broadly dilated with stout spurs, tarsi with spinose hairs be- 

 neath. Antenna? slightly thicker externally. 



ANEPSIUS, Lee. 

 Anepsius, Lee, Ann. Lye. V. p. 147. 

 A. delioatulus, Leo., Ann. Lye. 5, 147-1.48. 



A small (.17 inch) insect, with brownish head and thorax and black elytra. The 

 thorax and head are continently punctured, the elytra punctured in strise. The eyes are 

 almost entirely divided. The under surface and legs are ferruginous. Occurs at Valle- 

 cito (Leconte), and in Owens' Valley, where many specimens were found under stones. 



TRIBE XII NYCTOPORINl. 



Mentum moderate, supported by a short broad gular peduncle, ligula hardly visible, 

 base of maxillae exposed, gense very prominent. Anterior tibiae slender, spurs small on 

 all the legs, tarsi silky pubescent beneath. 



NYCTOPORIS, Esch. 



Nyctoporis, Eseli., Zool. All. IV, p. 11. 



This genus, only one of the tribe, is remarkable for the vestiture of its tarsi. Its spe- 

 cies appear to be confined exclusively to maritime California, and to the region of the 

 Coast Range. 



Our species arc four in number, as follows: 

 Mead strongly carinatc. 



Thorax with two deep fovea?. c r i s t a t a . 



g a 1 e a t a . 

 c a r i n a t a . 

 eequicollis. 



Thorax not foveate, 

 Head not carinate ; thorax not foveate. 



NJ cristata, Esoh., Atlas Heft. IV, p. 11, a very rare species. Length .50 ineli. 

 N. galeata, Lee., Pacif. B. K. Rep, IX, Append. I, p. 49, pi. 2, fig'. 1. 



This species is closely allied to the preceding, and it is very doubtful whether they are 

 distinct. A typical specimen of cristata is in the collection of Dr. Leconte, and we are 

 thus enabled to make perfect comparisons. In both species the elytra are ornamented 

 with acute ridges interrupted, forming rather a series of short elevations or catenulations. 

 The only essential difference between the two species appears to be in these ridges. In 

 cristata they are rather longer, less acute on top and higher than in galeata. The two 

 forms thus appear to differ strikingly at first sight, but an analysis shows but little of spe- 

 cific value, and it is highly probable that other forms from the northern portion of Cali- 

 fornia will unite the two. Found abundantly near San Francisco. 



Length .50 inch. 



A MEM. PH1LOSO. SOC VOL. XIV.- 



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