DESCRIPTIONS OF NEW SPECIES. 25 



This species resembles in characters P. cinctus, but is larger, and 

 the margins of the body are not at all disposed to be brown as 

 in that species. 



HYDROBIFS Leach. 



•79. H. despectus. Ovalis, valde convexus postice subgibbosus, nigro- 

 aeneus subnitidus, tborace alutaceo, versus latera picescente, elytris 

 lateribus subtiliter punctatis, dorso fere laevibus, stria suturali ante me- 

 dium obliterata ; subtus rufo-piceus. Long. '09. 



Middle and Eastern States. More brassy and much more con- 

 vex than H. subcupreus, and readily distinguished by the elytra 

 being nearly smooth at the middle, instead of being equably punc- 

 tured as in the other species. 



CATOPS Fabr. 



SO. C l>racliyderiIS. Breviter ovatus, convexus antice valde ob- 

 tusus, postice attenuatus, castaneus, belvo-sericeus, tborace latitudine 

 plus triplo breviore, antrorsum valde angustato et lateribus rotundat&, 

 angulis posticis acutis postice paulo prolongatis, subtiliter rugose punc- 

 tulato, elytris a basi oblique angustatis, transversim strigosis, stria 

 suturali antice abbreviata ; antennis tborace brevioribus, sensim paulo 

 clavatis. Long. *12. 



Nova Scotia; Mr. Ulke. A species remarkable for the great 

 breadth and obtuseness of the front part of the body. The nie- 

 sosternum is carinate. 



HYIJXOBIIIS Schmidt. 



81. H. substriatus. Ovalis, convexus, piceo-ferrugineus, nitidns, 

 tborace subtiliter punctato, lateribus rotundatis, antice angustato, angu- 

 lis posticis valde obtusis, elytris pallidioribus minus subtiliter punctatis, 

 puiictis seriebus confertis digestis ; antennarum articulo 7mo et 9no 

 aqualibus, intermedio triplo latioribus. Long. -10. 



Mas femoribus posticis dente maximo acuto versus apicem armatis. 



Xova Scotia and New York ; Mr. Ulke. It is evident that 

 the rows of punctures on the elytra represent alternately striae 

 and interstitial punctures, but they are of equal size and equally 

 dense. 



AMPHICYIXI8 Er. 



82. A. picipenuis. Rotundato-ovalis, convexa, rufo-picea nitida, 

 tborace punctulato, a basi sensim angustato, angulis posticis obi 



