122 MEMOIRS ON THE COLEOPTERA 



tate line; clypeus three-fourths wider than long, feebly trapezoidal, 

 with arcuate sides and broadly rounded angles, the sinus very feeble; 

 edges thin, slightly reflexed; surface feebly bitumorose medially, 

 shining, finely rugulose in wavy lines; antennal club not quite so 

 long as the six preceding joints; mentum even, sparsely punctulate; 

 prothorax immaculate, rufous, less than twice as wide as long, in 

 form nearly as in lucida, everywhere sparsely punctate, very minutely 

 medially, rather coarsely toward the sides and bearing distinct erect 

 hairs; scutellum transversely ogival, having a fine eroded line of 

 punctures at some distance within the margins, within which line 

 there are scattered small punctures; elytra but little longer than 

 wide, more strongly rounded behind about the middle than in the 

 preceding section, the punctures sparse but distinct though shallow, 

 for the most part in unimpressed lines, becoming stronger, rather 

 dense and confused broadly toward the sides, each puncture with a 

 distinct erect hair; lateral swelling (9 ) moderate, elongate, the edge 

 beneath it forming a short shelf, which is abruptly limited poster- 

 iorly, black, each with a large rufous area before the middle, uniting 

 with the pale suture, which gradually disappears toward the scu- 

 tellum; pygidium transverse, shining, black, finely, sparsely punctu- 

 late and with moderate sparse erect hairs, the surface finely rugulose 

 along the base; sterna and abdomen as in the preceding sections; 

 legs slender, the tarsi very long in both sexes. Length (9) 17.00 

 mm.; width 8.7 mm. Colombia. [Cyclocephala gregaria Ar.] A 



single example marked "cotype." *gregaria Arrow 



12 Form rather narrow, cylindric-oval, very convex and shining, pale 

 rufous, the head black, with rufous clypeus, the elytra more tawny- 

 flavate, immaculate throughout above; under surface, pygidium 

 and legs castaneous-red, the tarsi a little darker; head rather large, 

 with notably prominent eyes, three-fifths as wide as the prothorax, 

 finely and sparsely punctate, the median line with a short fossa at 

 base; clypeus as in the preceding species in outline and fine edges, 

 but a little shorter and with the sculpture very fine, feeble and 

 sparsely punctuliform; suture more distinct; antennal club ( 9 ) as 

 long as the entire stem; mentum evenly and moderately convex, 

 minutely, sparsely punctate; prothorax less than twice as wide as 

 long, as in lucida, except that the anterior margin is more prominently 

 arcuate at the middle, as in circulifer, the acute apical angles only 

 moderately advanced; punctures everywhere sparse, very minute 

 medially, distinct but not coarse laterally, apparently non-setulose; 

 scutellum ogival, with scattered punctures, except in a broad smooth 

 margin; elytra long, fully a third longer than wide, only a little wider 

 than the prothorax, parallel, with feebly arcuate and almost even 

 sides ( 9 ) and without trace of the short shelf or lateral swelling of 

 the preceding sections, evenly rounded in nearly apical half; surface 

 with the punctures not very fine and rather close-set, only very 

 feebly impressed and inconspicuous, hairless, confused throughout, 

 not different in character postero-externally, each elytron with three 

 very feeble convex discal lines; pygidium (9) transverse, shining, 

 finely, very remotely punctate, rugulose laterally, not pubescent, 



