1 62 MEMOIRS ON THE COLEOPTERA 



but more loosely and coarsely so toward the lateral angles than in 

 dimidiata; hind tarsi slender, four-fifths as long as the tibiae; punc- 

 tures of the transverse abdominal series finer and more confused. 

 Length (cf) 11.4 mm.; width 6.0 mm. Lower California (San Jose del 



Cabo). [ Cyclocephala elegans Horn] elegans Horn 



4 Body oblong-oval, much smaller in size, rather dilated posteriorly in 

 both sexes; coloration and lustre as in the preceding species; head 

 (cf ) a little more than half as wide as the prothorax, the punctures 

 fine and rather sparse; eyes very large, prominent, separated by 

 two-thirds more than their width; clypeus relatively small and short, 

 three-fifths wider than long, exactly trapezoidal, the obtuse angles 

 rather well defined, the oblique sides and truncate apex straight, 

 the apex gradually and moderately reflexed; surface with coarse, 

 shallow, gradually anteriorly obliterated rugulose sculpture; suture 

 almost straight; antennal club evidently shorter than the stem; 

 prothorax nearly twice as wide as long, nearly as in the preceding 

 but more arcuate at base and with more broadly rounded angles; 

 scutellum similar but shorter, more obtusely ogival; elytra shorter 

 than in dimidiata, a third longer than wide, more obtusely rounded 

 at tip, nearly a third wider than the prothorax; punctures rather 

 coarse, close-set and in close unimpressed series, confused on the 

 second and fourth intervals; pygidium closely scabriculate through- 

 out; hind tarsi nearly as long as the tibiae. Female larger but 

 otherwise nearly similar, the eyes separated by very nearly twice 

 their width; antennal club a little smaller; prothorax nearly as in 

 the male, the elytra similar, the edges not modified; pygidium simi- 

 larly densely and finely scabriculate but less convex, it being tumid 

 near the apex in the male; hind tarsi barely three-fourths as long as 

 the tibiae. Length (cf 9 ) 9.2-10.5 mm.; width 4.6-5.4 mm. Pan- 

 ama (Chiriqui) *ocularis n. sp. 



If I have identified elegans properly, it is undoubtedly not the 

 same as dimidiata, the abbreviated hind body and more strongly 

 punctured elytra giving it a distinctly different appearance. The 

 pronotum in dimidiata is sometimes nearly as black as the head, 

 though usually it is of a bright brownish-rufous color, always 

 perfectly uniform throughout the surface. 



Homochromina n. gen. 



In this genus the clypeus has a form altogether different from that 

 seen in any of the immediately preceding genera and is more like 

 that of Stigmalia, though not having any indication of apical 

 sinuation; it is large and nearly flat, finely sculptured and with 

 feeble trapezoidal outline and arcuate, very moderately reflexed 

 apex, having broadly rounded angles. The coloration and general 

 aspect of the body is nearly as in Dichromina, but the tarsi are not so 



