﻿MELOLONTHIMB OF THE UNITED STATES. 231 



Mas antennarum clava magna, clypeo recte truncate, thoracis margine postico longe villoso. Long. -97 — 1-17. 

 Femina antennarum clava parva, clypeo antice subsinuato, thoracis margine postico brevius villoso, tibiis 

 anticis tridentatis. Long. 1-05 — 1 # 35. 



Oregon, Washington Territory and California. So similar to the preceding that the 

 females might be readily confounded ; on comparison, however, I find the following 

 differences independent of sex. The yellow scale-like hairs are lanceolate, and narrow, 

 being on the elytra about four times as long as their width ; on the disc of the thorax 

 especially in the vittee they are broader, but towards the margins they are elongated, 

 and are gradually converted into long hairs, which towards the apex are as long as 

 those on the back of the head : the sides of the thorax from a dorsal view appear 

 rounded, and not angulated. 



The base of the thorax of the male is densely fringed with long yellowish hair, about 

 three-fourths as long as the scutellum, but in the female the hair is not longer than 

 in both sexes of P. 10-lineata. The under surface is as in the preceding; the legs 

 are however ferruginous in every specimen before me : the margin of the elytra, the 

 pygidium and last ventral segment are also usually ferruginous. 



The study of the genus Lachnosterna indicates that in this tribe species may be 

 really distinct, although almost without differences in form and sculpture, otherwise 

 I should not venture to distinguish the present by a specific name, but should rather 

 class it as a race of P. 10-lineata. 



5. P. v a r i o 1 o s a, fusco-ferruginea, undique minus dense albido-pubescens, capite postice villoso, thorace an- 



trorsum fortius angustato, lateribus oblique magis rotundatis, angulis posticis obtusis, canaliculato pube 

 densiore subtrivittato, elytris, sutura anguste, guttisque pluribus densius pubescentibus. Long. -8 — 9. 

 Mas antennarum clava magna, clypeo concavo antice latiore fere recte truncato, thorace margine basali medio 

 longe villoso. 



Femina haud visa. 



Harris Ins. Inj. Vegetation, 1st ed. 30. 



Melolontha variolosa Hentz, Trans. Am. Phil. Soc. 3, 256, pi. 2, fig. 5. Harris, Ins. Inj. Vegetation 

 2nd ed. 28. 



Middle States, Massachusetts, New Jersey. This species seems to have been con- 

 founded by Erichson and Burmeister with the following, to which it bears but little 

 resemblance ; or at least the name has been quoted as a synonym, without any know- 

 ledge of the object or figure to which it referred. Apart from the want of regular 

 vittse on the elytra, the pubescence is much less dense, the occiput clothed with long 

 hair, the thorax is shorter, and more narrowed anteriorly and more rounded on the 

 sides, the body is less elongated, and much less cylindrical than in the next species. 

 The abdomen is sometimes fuscous, sometimes reddish brown, with bands of whitish 

 pubescence. 



6. P. o c c i d e n t a 1 i s, elongata, cylindrica ferrugineo-testacea densius pallide pubescens, thorace antror- 



sum parum angustato, lateribus rotundatis, angulis posticis rectis, vitta dorsali alba, alteraque utrinque 



