DYNASTIN/E 113 



split larger claw and in the form of the clypeus, which is nearly 

 flat, feebly sculptured, larger in size, feebly trapezoidal, with arcuate 

 apex and broadly rounded angles, the apex moderately reflexed and 

 without trace of lateral angulation. [Type H. divisa n. sp.] Neo- 

 tropics *Homochromina n. gen. 



15 Form elongate-oval, strongly convex, very shining, the type deep 

 black throughout, the elytra with transverse rufous ornamentation; 

 clypeus large, flat, semicircular, the apex moderately reflexed, feebly 

 sculptured, the suture very fine, sinuous; base of the pronotum with 

 a strong entire double edge; middle coxae distinctly separated. 

 [Type Cyclocephala fasciolata Bates] Mexico. . *Halotosia n. gen. 



16 Body elongate-oval, convex, very highly polished and almost com- 

 pletely sculptureless; elytra of peculiar form, more narrowed pos- 

 teriorly and but little longer than the head and prothorax, the latter 

 unusually elongate and but little wider than long, the basal edge 

 finely double; clypeus large, feebly trapezoidal, with arcuate sides, 

 rounded angles and arcuato-truncate, feebly reflexed apex, only very 

 slightly sculptured; middle coxae slightly separated; tarsi long and 

 slender. [Type Melolontha castanea Fabr.] Tropical South America 

 Guyana *Aclinidia n. gen. 



17 Outline oblong-suboval, strongly convex, highly polished, almost 

 completely sculptureless and monochromatic as in the preceding 

 genus; clypeus very large and broad, nearly flat, feebly sculptured, 

 parallel at the sides, the truncate apex broadly sinuate medially, 

 the angles rounded, the periphery strongly beaded, thickly at apex, 

 which is unreflexed ; pronotum of peculiar form, the feebly converging 

 sides sinuate basally, the angles distinct; base margined laterally; 

 ligula small, subquadrate; middle coxae contiguous; anterior tarsi 

 (cf ) with short basal joints and very large claw-joint as in the 

 preceding genus. [Type Apagonia emarginata Mann.] Brazil. 



*Erioscelis Burm. 



1 8 Anterior tarsi modified sexually, the claws unequal in the male as in 

 all the preceding genera; tip of the prosternal process bulbose or en- 

 larged 19 



Anterior tarsi similar in the male and female, slender 20 



19 Pygidium free, glabrous; body subcylindric, the elytra briefly inflated 

 at the middle in the female, variably sculptured but always in part 

 linearly; clypeus short, strongly trapezoidal, sinuato-truncate at 

 apex; mentum large, smooth, not very convex, the ligula much 

 constricted; base of the pronotum never margined; legs slender, the 

 middle coxae contiguous. [Type Melolontha geminata Fabr.] 

 Neosubarctic regions to Brazil. ( Chalepns MacL.) 



Dyscinetus Harold 



Pygidium shorter, united rigidly to the propygidium, having long con- 

 spicuous pubescence; body more oval, more acute at apex, the elytra 

 more nearly covering the pygidium, especially in the female, where 

 its sides are similarly obtusely prominent at the middle; other char- 

 acters nearly as in Dyscinetus, except that the ligula is broad and not 

 T. L. Casey, Mem. Col. VI, Oct. 1915. 



