230 ACADEMY OP NATURAL SCIENCES 



Inhabits the United States. 



Tritoma higuttatum Knoch in Melsh. Catal. 



Body punctured, black, yellowish beneath : head dull piceous, 

 darker on the disk : elytra with punctured, slightly impressed 

 striae, each with a large, basal, yellowish-rufous spot extending 

 from the scutel to the humeral angle, and hardly attaining the 

 middle of the elytron. 



Length less than three-twentieths of an inch. 



A common species. 



[Afterwards described as Tritoma hasaJis Lac. — Leg.] 



PHALACRUS Payk. Latr. 



1. P. PALLIPES. — Piceous-black, polished, antennae, palpi and 

 feet testaceous. 



Inhabits Missouri. 



Body deep piceous-black, highly polished, immaculate : an- 

 tennae and palpi pale testaceous; terminal joint of the former 

 much largest, abruptly narrowed at tip : thorax with minute, 

 obsolete punctures each side ; angles acute ; an obsolete, indented 

 spot at the posterior angle ; base dilated somewhat in the region 

 of the scutel : elytra with obsolete, remote series of punctures, 

 rather more distinct near the external margin ; two impunctured 

 striae near the suture on each elytron : pectus and venter with a 

 few yellow hairs : feet pale testaceous, with scattered hairs. 



Length not quite one-tenth of an inch. 



In considerable numbers on plants near the [91] Konza 

 village. The elytra appear perfectly smooth and polished to the 

 eye, and to an ordinary magnifier. 



[A species of Olibrus, unknown to me. — Leg.] 



2. P. PENICILLATUS. — Black, glabrous, oval ; thighs ciliate at 

 tip. 



Inhabits the United States. 



Body oval, entirely deep black, glabrous, impunctured, polish- 

 ed : antennae piceous-black, with sparse, short setae ; terminal 

 joints with cinereous, short pubescence : thorax minutely punc- 

 tured ; angles subacute ; elytra, humeral angle subacute, with 

 obsolete, distant series of punctures, and an impressed stria near 



[Vol. IV. 



