AMERICAN PHILOSOPHICAL SOCIETY. 521 



rufous; epipleura and margin of the pectus behind the eye yel- 

 lowish. 



I obtained this species in Georgia and East Florida. It closely 

 resembles the preceding species, but may be at once distinguish- 

 ed from it by the color of the epipleura and inferior surface of 

 the body. 



[From Vol. IV. pp. 499— .] 



Descriptions of new North American Insects and Observations on some 

 already described. * 



Real Nov. 2, 1S32. 



AMBLYCHEILA Say. 



Labrum transverse, much wider than long; mandibles promi- 

 nent, strongly toothed; labial palpi elongated ; basal joint short, 

 entirely concealed by the mentum ; second joint short, spherical, 

 resting on the edge of the emargination of the mentum; the 

 third joint elongated, cylindric, with rigid hairs ; fourth joint 

 enlarging to the extremity where it is truncate, somewhat sinuate ; 

 mentum, tooth robust, prominent, canaliculate before, acute ; an- 

 tennae, second joint two-thirds the length of the third ; wings 

 none ; elytra united ; eyes very small, hemispherical, entire ; 

 clypeus at tip entire. 



A. CYLiNDRiFOMis Say, (Manticora) Journ. Acad. Nat. Sci. — 

 This insect, which I found near the Rocky Mountains, I de- 

 scribed under the genus Manticora, but judging by the present 

 mutilated state of the specimen it seems to agree better with the 

 Megacephala. It differs from Manticora altogether in form, in 

 the smaller size of the head, and in not having a lobed thorax, &c., 

 but it corresponds in the comparative magnitude of the eyes, the 

 diameter of which is hardly more considerable than that of the 



[A portion of tliis paper, ending witli Pangus, [IV. 431] was first 

 printed in the Disseminator, (a newspaper published at New Harmony) 

 from June 1830, to August 1830 ; another portion from the beginning 

 to Elater obesus [VI. 168] was issued as an Svo. pamphlet, bearing on 

 the title page the date New Harmony, Indiana, 1829— 1833.— Lec] 

 1834.] 



