568 TRANSACTIONS OF THE 



tion of the palpi is confined to the labial. The name is derived 

 from the words cojyto, I cut, and tome, joint or articulation, in al- 

 lusion to the form of the palpi. 



C. SERRIPALPUS, — Yellowish; elytra brownish varied with 

 whitish. 



Inhabits Mexico. 



Body oblong-oval, honey-yellow; head black on the posterior 

 margin ; labial palpi with the penultimate joint crenate or bitu- 

 berculate before ; thorax on the middle of the anterior and pos- 

 terior margins broadly black ; elytra brownish, with very numer- 

 rous, minute honey-yellow [444] points ; two very slightly im- 

 pressed striae, with punctures hardly distinguishable from minute 

 inequalities of the surface, and an indistinct part of a series of 

 hardly impressed punctures each side ; from the base near the 

 scutel proceeds a whitish broad vitta one-fifth of the length of 

 the elytra, bifid at tip ; from the humeral base to the tip, pro- 

 ceeds a broad, interrupted and somewhat irregular vitta also whit- 

 ish ; venter piceous. 



Length less than three-tenths of an inch. 

 This insect was obtained on the estate of the Conde del Regla 

 about 10 leagues N. E. of the city of Mexico, by William Ben- 

 nett, and presented to me by Mr. William Maclure. It cannot 

 be the DijtUcus circumscriptas, Germ., which is " breviter ovali." 



LACCOPHILUS Leach. 

 L. MACULOSUS Say, Trans. Amer. Philos. Soc— Since described, 

 by Germar, also under the name o{ maculosus, Sp. Gen., p. 30. 



HYPHYDllUS Latr. 

 H. PUNCTATUS Say, (Laccophilus) Journal of the Acad. Nat. 

 Science. 



[Ante, 1, 178. Belongs to Hydroporus. — Leg.] 



HYDROPORUS Clairv. 

 1. H. BIFIDUS. — Elytra with a subsutural, impressed, punc- 

 tured stria. 



Inhabits Mexico. 



Body black ; head with much dilated indentations between the 

 eyes ; a longitudinal honey-yellow line, more dilated before ; an- 



[Vol. IV 



