— 82- 



P. humeralis Fab. Em. Syst. Suppl. p. 143; Bland, Proc. Ent. Soc. Phil. I, 

 1862, p. 276. var. Length .50-. 64 in. =13-16 mm. Hab. Atlaatic States, Ohio to Mo. 



Entirely black except the elytra, which bear a reddish humeral 

 space, defined by a line running from scutellum to middle of outer mar- 

 gin. (PI. II, fig. II.) 



Variety axillaris Hald. Trans. Am. Phil. X, 1847, p. 31; Lee. J. A. P. ser. 2. 

 II, p. II, N.Y., Pa , Texas. Mass. 



The red space is larger and the punctuation not so coarse. 

 P. dimidiatus Lee. Trans. Am. Ent. Soc. XTI, p. 23. Length .72in.=i8mm. 

 ILib. Yreka Cal. 



Black except disk of thorax antl anterior half of elytra. Punctuation 

 also more coarse than in humeralis. 



METALEPTUS, Bales. 

 This genus, recently added to our list by the occurrence of two spe- 

 cies in Arizona and Southern California, is allied to Purpiiruenus and 

 difiers in the absence of antennal tubercles in (^ and in the pubescent 

 surface. Two species may be separated thus: 



Apices of elytra conjointly rounded; more coarsely punctured Batesi. 



Apices of elytra sinuously truncate; less coarsely punctured angulatus. 



M. Batesi Horn Trans. Am. Ent. Soc. XII, p. 174. Length .40-. 52 in. ^=10- 

 13 mm. Hab. Arizona. 



Black, sparsely clothed with gray pubescence, elytra at base and en- 

 tire lateral margin red. 



M. angulatus Chev. Col. Mex. Cent. 1, f. 4, n. 83. Length .40-52 in. = 10- 

 13 mm. Ilab. Mexico, So. Cal. 



To be distinguished only by characters of table above. (PI . II, f 12) 



AETHECERUS, Chev. 

 Thorax finely punctured; scutellum small, rounded at tip. The fol- 

 lowing synopsis is extracted from Dr. Horn's paper, Trans. Am. Ent. 

 Soc. VIII, 1880, p. 133, where a full discussion of this and other genera 

 may be found. 



SY^sOF&lS OF AETHECERUS. 

 Thorax broader than long; elytra truncate at tip. 



Elytra feebly shining, the punctures near the apex not densely placed; thorax not 



maculate Wilsonii. 



Elytra opaque, punctures near apex very fine and densely placed ; thorax with two 



discal black spots Hornii. 



Thorax as long as broad, elytra rounded at tip latecinctus. 



A. Wilsonii Horn Proc. Ac. Phil, i860, p, 570, pi. VIII, fig. 4. Length .60 

 in. =15 mm. Hab. Ariz., Texas. 



A. Hornii Lee. Gen. Col. IX, p. 184. Length .60 in. = 15 mm. Hab. Fla. 

 A. latecinctus Horn Trans. Am. Ent. Soc. VIII, p, 134. Length .40. 60 in. 

 = 10-15 mm. Hal). Arizona. (PI. II, fig. 13.) 



