274 ACADEMY or NATURAL SCIENCES 



ent from the inarginata Linn., by its much more dilated form. 

 I have one specimen which is three-fifths of an inch in length. 



[Belongs to Photinus as enlarged by Lacordaire, Gen. Col. A, 

 321.— Leg.] 



3. L. CENTRATA. — Thorax rosaceous, with a black centre; 

 elytra margined with yellowish. 



Lampyris limbato, Melsh. Catal. 



Body oblong: head blackish; mouth dull rufous; antennae 

 simple, compressed and with the palpi, black : thorax rounded 

 before, destitute of a carinated line ; a black vitta, each side of 

 which is a large rosaceous spot ; lateral margin not excurved to- 

 wards the posterior angles, yellowish ; anterior margin dull tes- 

 taceous yellow ; posterior edge rectilinear : elytra brownish- 

 black, a narrow exterior, sutural and terminal margin, yellowish : 

 abdomen, terminal segments bright yellow. 



Length from two-fifths to nine-twentieths of an inch. 



Var. a. Thoracic vitta abbreviated. 



Very similar in its markings to the preceding, but is less dila- 

 ted, the thorax is rounded before, with its posterior edge rectili- 

 near, and the lateral margin is not blackish, &c. 



[Also a Phofimis, but previously described as L. pyralk Linn, 

 and L. rosata Germ. — Leg.] 



5. L. RETICULATA. — Ellytra dusky, with longitudinal elevated 

 lines, and transverse ones in the interstitial spaces. 



Body rather slender : head yellowish ; eyes black : [164] tho- 

 rax wider than long, accurately rounded before : depressed mar- 

 gin wide at the posterior angles : pale yellowish, blackish on the 

 disk ; lateral and anterior margins a little recurved : elytra fus- 

 cous, with longitudinal elevated lines, and intermediate, trans- 

 verse, somewhat irregular ones : pectus pale yellow each side : 

 postpectus and feet pale yellow. 



Length less than one-fifth of an inch. 



A single specimen was brought from Arkansa by Mr. Thomas 

 Nuttall. It may be readily distinguished from the other species 

 of the United States by its reticulated elytra, and slender 

 form. 



[Constitutes the genus Pliausis Lee; the antennae have 12 

 joints, the last being very small and subulate. — Leg.] 



[Vol. V. 



