AMERICAN rniLOSOPHICAL sociExy. 550 



tennfc yellowish, dusky at tip ; thorax with asubmaiginal lioney- 

 yellow band before having three processes, one iii the middle, and 

 one, rather more dilated, on the lateral margin, not reaching the 

 posterior edge ; elytra with a very distinct, jxiuctured, impressed, 

 aubsutural stria, and about two other hardly obvious ones near the 

 middle : bifid yellowish lines at base near the tip ; feet dark 

 honey-yellow. 



Length less than one-fifth of an inch. 



This species and the two following were taken by William 

 Bennett in a small river beyond Vera Cruz, and were presented 

 to me by Mr. Mae lure. 



"2. II. NUDATUS. — IJeneath black; feet yellowish ; thorax and 

 head [445] on their disks yellowish ; elytra blackish with lines 

 and ti]) yellowish. 



Inhabits Mexico. 



Head with numerous deep punctures, honey-yellow on the diek, 

 blackish each side and behind ; antennae pale yellowish, dusky at 

 tip; thorax with numerous deep punctures, more dense and ob- 

 vious towards the base, honey-yellow, anterior and posterior mar- 

 gins dusky; elytra brownish black, with numerous, profound, 

 approximate punctures; striae not distinct, but traces of two may 

 be discovered near the base; about four more or less conflueni 

 lines at base, irregular ones each side and tip dull whitish-yellow; 

 beneath black, pectus yellow ; feet honey-yellow. 



Length over three-twentieths of an inch. 



3. H. SERICATUS. — Yellowish ; elytra blackish with abbff- 

 viated lines and margin dull yellowish. 



Inhabits Mexico. 



Dull honey-yellow, somewhat sericeous above ; head with a 

 dilated, not profound, indentation each side, and numerous small 

 punctures ; antennas also honey-yellow ; thorax a little dusky oti 

 the anterior and posterior margins, with numerous, small, slightly 

 impressed punctures; elytra dark brownish, almost black, more 

 obviously sericeous than the thorax ; striae none ; lateral margin 

 dull honey, dilated near the base into a band of about four ab- 

 breviated, uneijual, longitudinal lines, excepting the inner one. 

 not reaching the base, another somewhat similar band behind 

 the middle and slight double dilatation at tip of the same color. 



Length less than one-fifth of an inch. 

 1831.] 



