﻿MELOLONTHID^] OF THE UNITED STATES. 277 



emarginato, thorace sat dense punctato, lateribus valde rotundatis, elytris parcius punctatis, striatis, 

 pygidio subtilius punctato, coxis posticis parce fortiter punctatis. Long. *3. 



Sacramento, California, collected by Mr. Wittick, and given me by Mr. S. S. 

 Rathvon. This species differs from the two preceding by the greater roundness of 

 the sides of the thorax, which is slightly wider at the middle than at the base. The 

 hairs of the sides are shorter and fewer in number ; those of the sides of the elytra are 

 about as usual. 



15. S. trociformis, ovata, convexa nigra subnitida, paulo iridescens, clypeo fortiter punctato, marginato, 

 antice subemarginato, thorace lateribus obliquis paulo rotundatis, fortius sat dense punctato, elytris saepe 

 fulvis, profunde striatis et in fundo striarum punctatis, pygidio parce fortius punctato, coxis posticis 

 fortiter haud dense punctatis, antennis tibiis tarsisque plus minusve rufescentibus. Long. -25. 

 Burni. Lamell. 2, 2nd, 179. 



Omaloplia trogiformis Uhler, Proc. Acad. Nat. Sc. Philad. 7, 415. 

 ? Melolonlha aphodiina Bilberg, Mem. Acad. St. Petersb. 7, 386, fig. 7. (fide Burm.) 



Middle and Southern States, not common. The difference in color would tempt 

 many to separate the variety with fulvous elytra, but, although intermediate speci- 

 mens do not occur, no difference in form or sculpture exists. 



6. MACRODACTYLI. 



Among the divisions with prominent conical anterior coxae, this is distinguished 

 by the upper lip being small and beneath the prolonged clypeus, the mentum chan- 

 neled, narrow, the segments of the abdomen not connate, the fifth always longer than 

 the others, and finally by the ungues being mostly equal and diverging, and not 

 capable of being folded along the joint. The genera are numerous, and entirely 

 confined to America ; only one is found within our limits. 



Macrodactylus Latr. 



1. M. su b s p i n o s u s, (testaceus ? vel) nigro-fuscus, undique dense pollinoso-squamulosus, thorace convexo 



latitudine parum longiore, pilis brevissimis suberectis parce vestito, elytris fundo testaceis, ano setoso, 

 antennis pedibusque testaceis, tarsis nigro-annulatis. Long -4. 

 Latreille, Cuvier's Regne Animal, 4, 562 ; ed. Amer. 3, 427 ; Enc. Meth. 10, 372; Laporte, Hist. Nat. 



2, 147 ; Harris, Ins. Inj. Veget. ed. 2nd 30; Burm. Lamell. 2, 2nd, 57. (synon. exclusa.) 



Melolontha subspinosa Fabr. Syst. EL, 2, 181 : Oliv. 5, 70, tab. 7, fig. 73 : Latr. Gen. Crust, et Insect., 

 2, 110. 



New York. The abdomen of the female is black and entirely free from bristles ; 



that of the male is testaceous, and at the middle of each segment are long bristles, 



without order, and more numerous than in M. elongatus. Like the other species it is 



very destructive to roses. 



2. M. setulosus, testaceus (vel nigro-fuscus ?) undique dense pollinoso-squamulosus, capite thoraceque 

 nigris, hoc convexo latitudine parum longiore, pilis erectis sat dense vestito, elytris (fundo testaceis) 

 pilis longis erectis versus basin parce vestitis, pygidio et ano longe piloso, antennis pedibusque testaceis, 



tarsis nigro-annulatis. Long. 



71 



