24 J. L. LECONTE, M. D. 



P. apicalis. — Scarlet, tarsi and antennae black, first joint of the latter and 

 scutel brown-red. Elytra sculptured as in the preceding, apical fourth black. Tro- 

 thorax as in the preceding but angulated at the middle. Length 11-17 mm. 



Arizona ; many specimens were collected by Mr. Morrison. The an- 

 tennae of the female are half as long, those of the male three-fourths as 

 lono; as the body, more strongly serrate in the former, the pubescence is 

 short but dense in this as in the preceding and next species ; they may 

 be only color varieties of one form, but the dilFerences parallel those of 

 certain Lycidse so perfectly that I am disposed for the present to view 

 them as distinct.* 



P. Ignitus. — Scarlet, sericeous pubescent. Antennae, tarsi and tips of middle 

 and hind tibiae black. Metasternum and abdomen more or less piceous. Length 

 11-13 mm. 



Arizona, found abundantly by Mr. Morrison. I have only females. 



L.IOPUS Serv. 



Ij. centralis.— Rather stout in form, like L. crassulus, densely covered with 

 short pale t;ray prostrate hair mottled with dark spots more conspicuously than in 

 that species; sides of prothorax oblique in front of the spine which is strong, acute 

 and situate just behind the middle. Elytra with small tufts of black scales ; there 

 is a common rounded sutural spot behind the middle and a lateral one in front of 

 the middle, there is also a small black spot near the scutel, which is dark, and two 

 clouds near the side behind the middle. Length 6.5 mm. 



Arizona, one specimen. 



liEMA Fabr. 



\j. balteata.— Shining, black, abdomen and transverse band at the middle 

 of the elytra bright rufous. Elytra bluish, the punctures of the rows are deep, 

 but well separated. Length 6 mm. 



Arizona, Mr. Morrison. Looks like L. solani, but is quite different by 

 coloration and less approximate elytral punctures. 



li. coiicolop. — Black with a greenish tinge. Prothorax a little longer than 

 wide, sparsely punctured, constriction less abrupt than in L. peninsulae, sides much 

 less rounded before. Elytra with striae composed of approximate deep but not 

 coarse punctures. Length 4 mm. 



Las Vegas, N. Mex., Prof. F. H. Snow ; one specimen. Similar to 

 L. cornuta, but diiFers by coloration, and by the elytral striae less close, 

 and composed of smaller punctures ; the striae are not fainter behind. 

 The head has a deep puncture on the vertex. 



■•■■• As remarked by Dr. LeConte it is doubtful whether rufipennis and Ignitus are 

 not color varieties of one species. At all events rufipennis should be compared 

 with Elytroleptus Alfredi Duges, La Naturaleza, v, p. 185, no mention of which is 

 made by Mr. H. W. Bates in the Biologia Cent. Am. It is possible that Alfredi 

 and rufipennis are varieties of Ptcroplatus pallidus Thoms. (G. H. Horn) 



