DESCRIPTIONS OP NEW SPECIES. 143 



Sculpture, but by the simple antennae and dilated broadly tri- 

 angular last joint of the maxillary palpi. 



BACTROCERUS LEC. 



434. B. concolor. Fuscus, pube pallidiore minus subtili vestitus, 

 capite thoraceque granulato-punctatis, hoc campanulato, latitudine 

 longiore, apice subito tubulatim constricto; elytris thorace latioribus 

 fortiter sat dense punctatis, punctis hie inde trausversim confluentibus, 

 ore pedibus antennisque dilutioribus, Lis articulo llmo |>rsecedentibus 

 quatuor sequali. Long. -30 -48. 



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

 This insect resembles in appearance Stereopalpus mellyi, but is 

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

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

 securiform as in Eurygenius, nor elongate and cultriform as in 

 Stereopatyus, 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 united. 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. 



CORPHYRA SAT. 



435. C. canalictllata. Picea subnitida, tenuiter pubescens, capite 

 parce punctulato, thorace flavo-testaceo, transverse, lateribus rotundatis, 

 margine basali reflexo infuscato, disco-convexo parce punctulato linea 

 dorsali impresso, foveaque utrinque vix distincto ; elytris thorace latiori- 

 bus, sat dense punctatis, punctis versum apicem paulo subtilioribus, 

 apice vage testaceis ; ore antennaruni articulis duobus primis, pedibus 

 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 other 

 species known to me by the more strongly transverse thorax with 

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

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



ground color. 

 10 



