DESCMPT EONS OF NEW SPECIES. 143 



sculpture, but by the simple antennas and dilated broadly tri- 

 angular last joint of the maxillary palpi. 



BACTROCEBUS Lec. 

 •434. D. concolor. Fuscus, pnbe pallidiore minus BubtiU restitufl, 



capite tboraceque granulato-punctatis, Loo oampannlato, latitndine 

 longiore, apice subito tubulatim constricto ; elytris thoraoe Latioritras 

 fortiter sat dense punctatis, pnnctis hie hide transversim ooDflnentibus, 

 • ore pedibus antennisque dilutioribus, bis articulo Hujo praacedentibus 

 quatuor sequali. Long. *30 — '48. 



Cape San Lucas, Lower California, collected by Mr. Xantus. 

 This insect resembles in appearance Stereo^ alpui mx llyi, bul is 

 larger and rather less slender. It differs generically in the form 

 of the last joint of the maxillary palpi, which ie neither broadly 

 securiform as in Eurygenius, nor elongate and cnltriform as in 

 Stereopalpus, but subtriangular, elongate, with the apical and 

 basal sides nearly equal, and the inner angle very obtuse ; the 

 antennae differ from those of the two genera named by the last 

 joint being much elongated, as in Statira, in the two specimens 

 before me equal in length to the four preceding anited. The 

 sculpture of the head and prothorax is peculiar, consisting of 

 slightly elevated umbilicated granules. The eyes, as in Stereo- 

 palpus, are subtruncate and scarcely emarginate in front, and the 

 claws scarcely dilated at base. A longer generic description is 

 unnecessary, as the other characters are the same as in the two 

 allied genera. 



CORPIIYRA Say. 



435. C. canaliculata. Picea subnitida, tesuiter pubeacena, capite 



parce punctulato, tborace flavo-testaeeo, transverso, lateribns rotun 

 margine basali reflexo infuscato, disco-convexo parce punctulato linea 

 dorsali impresso, foveaque utrinque vix distincto ; elytria tborace latiori- 

 bus, sat dense punctatis, punctia versum apfoem panlo Bubtilioribus, 

 apice vage testaceis ; ore antennarum articulia duobus prlmis, pedibtu 

 anoque flavo-testaceis. Long. "20. 



One specimen, collected in Ohio, by Mr. Fay, and kindly com- 

 municated by Dr. S. Lewis. Differs remarkably from the i 

 species known to me by the more strongly transv< rse thorax with 

 a distinct dorsal channel. The pale apical margin of the elytra 

 is distinct, but not well defined, fading insensibly into the piceotts 

 ground color. 



