138 MEMOIRS ON THE COLEOPTERA 



is rather difficult to surmise; it can scarcely be a stridulating 

 apparatus and is more probably a roughening designed to secure a 

 less slippery hold in copulation. Besides the true signata Drury, 

 collaris Burm., and detecta and microspila of Bates, which I do not 

 have among my material at present, the group is composed of the 

 following species: 



Larger claw of the anterior male tarsi very unequally cleft at apex, the 

 slender ramus extending about as far as the tip of the large lower part 

 of the claw, which is obliquely truncate at tip; distal parts of the 

 third and fourth joints of the tarsus and an elongate area on the 

 irregular but non-cavernous under surface of the fifth joint, minutely 

 and regularly strigilate. Body oblong-oval, feebly convex, shining, 

 none of the punctures of the upper surface setigerous, the punctures 

 of the front fine, sparse and uniform, not coarser toward the sides; 

 pronotum with the usual two black vittae of the group, the elytra 

 each with two subbasal and one post-median black spots, the suture 

 also black; pygidium (cf) thickly clothed with very long pubescence, 

 or ( 9 ) blacker in color, alutaceous, with the erect hairs sparse, 

 stiff, very short and not readily observable. Length (of 1 9 ) 14.0- 

 14.5 mm.; width 7.0-7.3 mm. Brazil *variabilis Burm. 



Larger claw not split at apex and without trace of a slender ramus. . . .2 



2 Upper outline of the larger claw evenly and unbrokenly arcuate from 

 base to the acute though blunt apex. Body oblong-oval, more 

 convex than in variabilis and larger, nearly similar in coloration and 

 ornamentation, the clypeus almost similar but more rectilinearly 

 truncate at tip, sometimes very feebly sinuate; punctures toward the 

 sides of the front coarse and setigerous, these setae, as well as those 

 borne by the larger thoracic punctures, excessively short; prothorax 

 of the usual form, transversely elliptic, deeply sinuate at apex; 

 scutellum longer than wide, very acutely pointed as in the other 

 species; pygidium (cf ) finely, very evenly punctate and with short 

 stiff erect sparse setae throughout, or ( 9 ) glabrous and very shining, 

 punctured toward the sides; apices of the third and fourth joints 

 of the anterior male tarsi and a very large area on the flat under 

 surface of the fifth joint, finely and closely strigilate; lateral swelling 

 of the female elytra strong and smooth, the edge beneath it evenly 

 arcuate, not at all sinuate. Length (cf 9 ) 15.0-16.0 mm.; width 

 7.3-8.4 mm. Mexico (Jalapa) *stictica Burm. 



Upper outline of the larger claw broadly and obtusely but sharply and 

 conspicuously angulate at about distal third of the length 3 



3 Male with the sides of the front more coarsely punctate and bearing 

 short and very thick, erect setae only very near the eyes; clypeu? of 

 the same sex nude and with fine dense even sculpture, except medio- 

 basally, where the punctures are distinct and separated, as they are 

 at the anterior margin of the front. Body oblong-elongate in form, 

 only feebly convex, shining; under surface, pygidium and legs red- 

 brown, the abdomen and pygidium sometimes nearly black, inde- 

 pendently of sex; head black, small, the vertex medially and base 



