﻿MELOLONTHID^E OF THE UNITED STATES. 239 



Male with the club of the antennae as long as the stem, the abdomen with a broad 

 longitudinal impression not extending upon the last segment, posterior tibiae with the 

 spurs free, very broad, flat and obtuse : tarsi longer than the tibiae. 



Female with the abdomen not impressed ; the posterior spurs as in the male, and 

 the tarsi hardly longer than the tibiae. 



Group III. 

 This group is established upon a single species, having most of the characters of 

 the preceding, but the form is oblong and the spurs of the posterior tibiae are con- 

 torted (at least in the male) and not flattened. The antennse are 10-jointed, the 

 mandibles and palpi as in the preceding, the clypeus is strongly margined, hardly 

 emarginate. The thorax is rounded on the sides and serrate, but only very slightly 

 narrowed at the base. The breast is moderately hairy, and the claws are toothed 

 near the base : the spurs of the posterior tibiae of the male are free, the inner (lower) 

 one is curved, almost in a semi-circle, and inserted on the edge of the tibia, the upper 

 one is straight and prismatic, inserted upon the end. 



4. L. t o r t a, oblonga convexa, castanea nitida, capite dense punctato, clypeo fortius marginato vix 

 emarginato, thorace lateribus serratis postice paulo angustato, confertini fortius punctato, elytris eon- 

 fertim punctatis, subrugosis, costis parum distinctis, peetore dense brevius flavo-villoso. Long. -83. 



Two males collected in Texas by Messrs. H. Haldeman, and Lindheimer. The 

 propygidium is opake, sparsely punctured, the pygidium is shining, more strongly 

 punctured and subtruncate at tip : the abdomen is tolerably strongly punctured. 



The club of the antennae of the male is hardly as long as the stem; the abdomen 

 is longitudinally flattened, and the penultimate segment is roughened and slightly 

 elevated transversely at the middle near the posterior margin ; the inner spur of the 

 posterior tibiae is laterally inserted and curved in a semicircle, the outer one is shorter, 

 pointed, thick and three sided : the tarsi are longer than the tibiae. 



Group IV. 

 This group consists of small cylindrical species, glabrous above. The head is large, 

 the clypeus is entire in one species, and deeply emarginate in the others : the mandi- 

 bles project beyond the labrum : the last joint of the maxillary palpi is oval, nearly 

 pointed, not impressed externally in all but v o 1 v u 1 a, where it is cylindrical and 

 slightly impressed. The antennae are 9-jointed, with the joints 3 — 5 connate, the 

 6th slightly produced inwards. The last joint of the abdomen is tolerably large, 

 merely flattened and not impressed in the males. The inner spur of the posterior 

 tibiae of the male is fixed, and straight in the species here described. The tarsi 

 especially of the males are very long, and the claws are armed with a small tooth in- 

 side of the middle. 



5. L. frontalis, elongata, cylindrica pallide testacea, capite fusco rude punctato, canaliculate, clypeo 



