316 [Dec, 1845. 



Var. 1 a. Antennae testaceous;, slightly serrate ; elytra with an obsolete, elon- 

 gate yellowish basal spot, apex immaculate : tip of venter very slightly rufous. 

 Mordella eruciata, Mclsh. M. S. 



19. M. undulata. Blackish ; elytra with the apex and two undulated fasciae, 

 ashy. 1 L-5 1. long. Pennsylvania. 



Mordella undulata, Melsh. Catal. 



Blackish or brown, densely pubescent, with the pile mostly disposed in longi- 

 tudinal lines : head obscurely maculate with ashy ; antennas and palpi, dusky 

 testaceous, the former short, rather serrate : thorax with the margins, and two 

 longitudinal bands in the middle, obscurely ashy : elytra with the tip and two 

 arcuated bands, ashy : beneath blackish ; feet and posterior edge of the post- 

 pectus, dull testaceous : anal style short, conic. 



Var. a. Feet dull pale brown. 



Mordella trifasciata. Testaceous, disk of the thorax and three bands on the 

 elytra black. Say, Journ. Acad. Nat. Sci., V. 243. 



Var. a. Head blackish on the front; pectus in the middle testaceous. Mor- 

 della pectorali.s, Melsh. M. S. 



Var. b. Like variety a, with the anterior elytral band wanting. 



Ripiphorus, Fabr. 



1. It. dubius. Superior and posterior part of the head, thorax and tarsi 

 dark rufous : elytra and beneath black. 4. 1. long. Pennsylvania. 



Ripiphorus peclinatus, Fabr. Sys. Eleuth. ii, 1195 ] 



Head profoundly punctured, dark rufous with the face and eye3 black: 

 antennas black, with the basal joints rufous : mandibles dark rufous, with the 

 apical half black : palpi testaceous with the extreme tips dusky: thorax dark 

 rufous densely granulate: scutel and elytra black, the latter with a rufous tinge, 

 and an obsolete testaceous spot behind the base : pectus and abdomen black : 

 the former varied with obscure rufous : the latter with an obsolete rufous spot 

 each side of the basal segment : femora black, with the tibiae arid tarsi, dark 

 rufous. This species differs in several characters from the Fabrician description 

 of R. pectinatus. 



2. R. impressus. Black; thorax dark rufous, strongly transversely impres- 

 sed in front of the lobe : elytra testaceous, with the apex and a lateral spot black. 

 4 1. long. Pennsylvania. 



Head profoundly punctured, glossy, obtusely rounded on the vertex : antennae 

 and palpi rufo-testaceous, the former with the processes dusky : thorax dark 

 dusky rufous, densely granulate, strongly transversely impressed in front of the 

 basal lobe, which is carinate : elytra testaceous, tinged with rufous, with the 

 apex and an oval submarginal spot near the middle, black : beneath black : feet 

 dull rufous. 



Var. a. As in the preceding, with the thorax and femora deep black. As I 

 possess only two specimens of this species I cannot determine which ought to 

 constitute the type. 



3. R. maxi'llosus. Dull rufous ; mandibles prominent. Size of the preced- 

 ing. Pennsylvania. 



Ripiphorus maxillosus, Melsh. Catal. 



Head black, profoundly and rather much punctured, with the vertex obtusely 



