PACHYSCHELUS. 153 



be referable to this species. Five examples from Volcan de Chiriqui differ from the 

 specimens described above in being larger, measuring 1J lines in length. 



37. Pachyschelus biguttatus. (Tab. VIII. fig. 22.) 



Omnino azureus, nitidus ; elytris ante apicem fascia alba ad suturam interrupta ornatis. 

 Long, lg-lj lin. 



Hab. Panama, Bugaba 800 to 1500 feet, Volcan de Chiriqui 2000 to 4000 feet, David 

 (Champion). 



This species very closely resembles the preceding, but is entirely bright blue above, 

 and averages a little smaller. The terminal segment of the abdomen of the male has 

 four short triangular teeth, arranged in a curve, on each side of a moderately wide 

 triangular notch (fig. 22). 



38. Pachyschelus sticticus. (Tab. vill. fig. 23.) 



Omnino azureus, nitidus ; elytris ante apicem guttis duabus albis ornatis. 

 Long. 1| lin. 



Hab. Guatemala, Tamahu, Senahu, and San Juan in Vera Paz (Champion). 



This species closely resembles P. biguttatus ; the white spots on the elytra are, 

 however, a trifle wider, and more widely separated at the suture. The terminal 

 segment of the abdomen of the male is broad at the apex, only slightly curved, with 

 eight short, subequal teeth, the middle pair a little more separated than the others 

 (fig. 23). 



One example from San Juan is much shaded with golden-green. Three examples 

 from Teapa in Tabasco (H. H. Smith) appear to be referable to the same species. 



39. Pachyschelus pubicollis. (Tab. VIII. fig. 24.) 



Ovatus, convexus, postice bene attenuatus ; capite tboraceque brunneo-seneis, parce griseo-pubescentibus ; elytris 

 cyaneis, marginibus violaceo-tinctis, regione suturali subtiliter punctata, ante apicem fascia angusta alba 

 ad suturam interrupta ornatis. 



Long. 1| lin. 



Hab. Mexico, Teapa in Tabasco (H. H. Smith) ; Guatemala, San Juan in Vera Paz 

 (Champion) ; Panama, Taboga L, San Miguel in the Pearl Islands (Champion). 



This species resembles P. sticticus, but is narrower, and has the elytra much more 

 acuminate. The thorax is marked with moderately large, very shallow punctures, often 

 open on one side; these are few on the disc, but increase in number towards the sides, 

 where they are subconfluent in an oblique direction. The elytra are dark blue, with 

 the margins and apex violet ; near the apex of each elytron there is a slightly curved 

 white line, which does not reach the suture. The terminal segment of the abdomen of 

 the male is somewhat narrowed at the apex, with four subequal short teeth on each 

 side, placed obliquely, separated by a wide, but shallow, triangular space (fig. 24). 



biol. cente.-amee., Coleopt., Vol. III. Pt. 1, November 1889. X 



