CYPHOTHORAX.— OMOCHYSEUS. 49 



CYPHOTHORAX. 



Cyphothorax, C. O. Waterhonse, Trans. Ent. Soc. Lond. 1887, p. 180. 



I have proposed this genus for Stenogaster palleolatus, Chevr. It differs from 

 Stenogaster in having the second and third (as well as the fourth) joints of the tarsi 

 furnished with a slight pad ; the elytra have no costse. 



l. Cyphothorax palleolatus. (Tab. IV. fig. 4.) 



Stenogaster palleolatus, Chevr. Col. Mex. Cent. ii. no. 134 \ 

 Stenogaster gibber, Gory, Mon. iv. p. 205, t. 34. f. 196 2 . 



Hab. Mexico, Orizaba 1 . — Brazil 2 . 



AUTAECONTES. 



Autarcontes, C. O. Waterhouse, Trans. Ent. Soc. Lond. 1887, p. 180. 



I include in this genus Agrilus mucoreus, Klug, and some allied species. These 

 have the thorax broad and transverse, with an angular projection at the sides just 

 before the base ; and the elytra somewhat parallel for two thirds of their length and 

 then obliquely narrowed to the apex, the apex of each being slightly sinuate. Each 

 elytron has a single obtuse costa extending beyond the middle, the dorsal space between 

 them being more or less flat. 



The basal joint of the posterior tarsi in A. mucoreus is short, but in A. abdominalis, 

 which I cannot dissociate from it, the basal joint is nearly as long as in Agrilus. 



l. Autarcontes abdominalis. (Tab. IV. fig. 6.) 



Niger ; elytris inter costas aenescentibns immaculatis, fascia angusta ante apieem (e pube grisea) ornatis ; corpore 



subtus cyaneo, maculis coccineis utrinque ornato. 

 Long. 8 lin. 



Hab. Nicaragua, Chontales (Belt). 



The thorax in this species has the angular projection at the sides very acute ; there 

 are three impressions on the disc, the anterior one being small. The spot of red 

 pubescence on the basal segment of the abdomen is large and transverse ; those on the 

 following three segments are a little smaller, each with an ovate smooth space in the 

 pubescent spot. 



OMOCHYSEUS. 



Omochyseus, C. O. Waterhouse, Trans. Ent. Soc. Lond. 1887, p. 182. 



This genus is closely allied to Agrilus ; I have included in it two species, one from 

 Brazil and one from Mexico. 



biol. centr.-amer., Coleopt., Vol. III. Pt. 1, February 1889. H 



