1873.] lUd [Horn. 



the outer spur of the hind tibiae stouter and broader than the inner. 

 E. morio is slightly more robust but does not otherwise differ. Length 

 .28-.50 inch ; 7-13 mm. 



Occurs from the Middle States to Texas. 



E. maura, Lee. Ann. Lye. V, p. 162 ; Proc. Acad. 1853, p. 339. 



Black, shining, very sparsely pubescent with black hairs. Head shining 

 sparsely punctulate. Thorax longer than wide, very sparsely punctate, 

 sides at apical third slightly broader. Elytra gradually divergent, sub- 

 opaque, finely scabrous, very sparsely pubescent. Body beneath black, 

 more shining than the upper surface, sparsely punctulate and pubescent. 

 Spurs of hind tibiae slender and acute. Length .32-40 inch ; 8-10 mm. 



Male. Middle and hind femora with lower face broad, slightly concave, 

 smooth, and with the margins fimbriate. 



Occurs at San Francisco and San Diego. California. 



Epicauta sanguinicollis, Lee. Proc. Acad. 1853, p. 344, is unknown to 

 me in nature, having been originally described from a drawing. I cannot 

 assign it a place in the foregoing revision. 



In the preceding descriptions but little mention has been made of the 

 sexual characters of each species. In this genus, great uniformity pre- 

 vails, and in fact the sexes vary but little in the structure of their ter- 

 minal segments and are, as follows : 



Male. Fifth ventral segment truncate, rarely feebly emarginate, sixth 

 oval slightly emarginate at tip. 



Female. Fifth ventral always truncate, sixth oval rounded at tip. 



Cantharis, Linn. 



Lytta auct. 



The species of Cantharis known to exist within our faunal limits have 

 become moderately numerous and since the publication of the synopsis 

 of the family Meloid.e (Proc. Acad., 1853, pp. 328 et seq.) no attempt 

 has been made to bring them before our students in the sense in which 

 the term Lytta has since been restricted (Class. Col. N. Am., p. 273). 



In order that the object of the present essay may be the better attained, 

 the species may be divided into three primary groups. 



Group I. Antennae of male with intermediate joints (4-5-6-7) either 

 deformed or much thicker than those which precede or follow. Antenna- 

 more or less moniliform in both sexes, gradually stouter to tip in the 

 female and rarely longer than the head and thorax, never equal to half 

 the length of body. Type, 0. vulnerata, Lee. 



Group II. Antennae not dissimilar in structure in the sexes, either 

 moniliform or slender, always gradually stouter toward the tip, in several 

 species longer than half the length of body. Types, C. cardinal^, Chev. 

 (moniliform antennae), C. stygica, Lee. (slender antennae.) 



Group III. Antennae with compressed joints : joints 5-10 usually 

 broader than long, thoi-ax very convex, somewhat spherical in form. 

 Both hind tibial spurs slender and acute. Type, C. compressicomi.% Horn. 



