142 GEO. H. HORN, M. D. 



group, and is consequently rather unlike the other members of the 

 genus. Its peculiar sexual characters will enable it to be distinguished 

 from any other species. 



Occurs in Colorado, New Mexico and Arizona. 



Ij. puberulus Lee. New Species, 1863, p. 78. — Oblong oval, brownish fer- 

 ruginous, surface not pruinose, sparsely clothed with very short erect hair. 

 Head densely and coarsely punctured, frontal suture finely impressed, front 

 flat, clypeus transverse, angles broadly rounded, at middle feebly emarginate, 

 margin moderately reflexed in front. Thorax one-half wider than long, nar- 

 rower in front than base, sides obtusely subangulate, margin not crenulate, 

 moderately densely fimbriate, disc moderately convex, surface very densely 

 and coarsely punctured. Elytra moderately coarsely punctured, more densely 

 along the suture near the base, gradually more sparsely at sides and apex, 

 margin fimbriate. Body beneath moderately densely hairy. Length .50 inch; 

 12.5 mm. 



Male. — Club of antennae scarcely as long as the funicle. Abdomen moder- 

 ately convex, sparsely punctured, last segment much shorter than the pre- 

 ceding. Claws alike on all the tarsi, each strongly pectinate on a single edge, 

 the outer claw on the middle and hind tarsi have o)ie of the teeth of the 

 pectination near the tip a little stronger. Hind tibiae slightly fimbriate within, 

 spurs slender, tarsus as long as the tibia. Pygidium scarcely convex, sparsely 

 punctate and oj)aque. 



Female. — Unknown. 



The posterior femora of this species are unusually coai*sely punc- 

 tured, a character not observed in any other. This species resembles 

 in form and size LacJi. tristis, and may at once be known from any 

 other species by the entire surface of the thorax being densely and 

 coarsely punctured. 



One specimen from Cape San Lucas, Lower California. 



Ij. SOOparius Lee. Synopsis Melolonthidse, Journ. Acad. Ser. 2, vol. ii, 

 p. 264. — Cylindrical, moderately elongate, rufo-piceous, surface distinctly prui- 

 nose, sparsely clothed with short erect hair. Head coarsely but not densely 

 punctured, shining, clypeus transverse, angles broadly rounded, feebly emar- 

 ginate in front, margin moderately reflexed. Thorax twice as wide as long, 

 narrower in front than at base, sides obtusely subangulate behind the middle, 

 margin coarsely serrulate in front of middle and fimbriate, disc moderately 

 convex, shining, sparsely punctate, punctures closer in front and near the 

 anterior angles. Elytra sparsely punctate, margin fimbriate, sutural and one 

 discal costa moderately distinct. Body beneath densely clothed with long pale 

 hairs, abdomen sparsely punctate. Length .60 inch; 15 mm. 



Male. — Club of antennae slightly longer than the funicle. Abdomen flattened, 

 fifth ventral feebly emarginate at middle and with a submarginal elevated 

 line angulate to the front. Sixth ventral suddenly elevated at middle and 

 terminating in two triangular teeth and fimbriate at the sides. Pygidium 

 large, very convex, sparsely punctate. Anterior claws pectinate along a double 

 margin, outer claw with one denticulation longer, simulating a slender tooth. 



