134 [November, 1844. 



Descriptions of New Species of Coleoptera of the United Slates. 



> By F. E. Melsheimeb, M. D. 



(Continued from page 118.) 



Lamellicornia, Latr. 



Ojjthophagus, Latr, 



1. O. castaneus. Testaceous ; head armed with two long erect horns. — 3| 1. 

 long. Pennsylvania. 



Light chestnut, clothed with very short ochraceous hairs : head with the front 

 profoundly and distantly punctured, with two long erect horns between the 

 eyes, and with the clypeus almost impunctured, reflexed and slightly repand at 

 tip; glossy : antennas pale, ochraceous : thorax densely and profoundly punc- 

 tured, moderately excavated each side before, and lobate in the middle; obtusely 

 grooved behind the middle : elytra each with six fine striae, interstices finely 

 punctured : pygidium with large, profound and vicinal punctures: beneath and 

 feet rufo-piceous, with the anterior pair of tibia dusky. The $ differs from 

 the $ in having the thorax dark green, the head, as in common, with two 

 transverse ridges in place of the horns, and the clypeus densely transversely 

 wrinkled- 



2. 0. niger. Black ; thorax with a greenish reflection. — 2| 1. long. Penn- 

 sylvania. 



Black : head profoundly and distantly punctured, with two small tubercles 

 between the eyes ; clypeus piceous, entire, rounded and reflexed at tip, and with 

 a short, transverse, elevated line each side at base : thorax numerously and pro- 

 foundly punctured, slightly excavated each side before, and slightly lobate in the 

 middle, with the lobe feebly concave in the middle 4 dorsal groove obsolete be- 

 hind the middle ; black, with a greenish reflection : elytra finely striate, with the 

 interstices finely punctured : pygidium punctured as in the preceding species: 

 venter black, opake : pectus pitchy-black: feet pitchy chestnut. 



3. O. rhinoceros. Black; elytra maculate with fulvous ; head with an erect 

 horn. — 4| 1. long. Pennsylvania. 



Scarabceus nuchicornis, Melsh. Catal. 



Black : head with a long erect horn on the vertex, being cylindric towards 

 the tip and flattened and dilated at base ; profoundly and distantly punctured, 

 each puncture furnishing one or two rufous hairs; clypeus with the margin re- 

 flexed, and faintly emarginate at apex : thorax much punctured, and clothed 

 with short rufous hairs ; a fine glabrous dorsa! line ; anterior edge slightly re- 

 tuso : elytra fulvous, confluently maculate with black, finely striate, interstices 

 with irregular series of minute and distant punctures ; hirsute like the thorax : 

 pygidium punctured as in castaneus : beneath and feet black, glossy': pectus and 

 under part of the head with long rufous hairs. The 9 differs from the $ in 

 bein^ destitute of the occipital horn, instead of which the head is armed with 

 two prominent transverse ridges, of which the anterior one is arcuated : the cly- 

 peus is also very rough with punctures. Distinct from the 0. nuchicornis, 

 Fabr. 



4. O. protensus. Green ; thorax anteriorly produced in a flat biped projec- 

 tion ; elytra at base and apex testaceous. — 4 1. long. Pennsylvania. Rare.^ 



