﻿MELOLONTHID^] OF THE UNITED STATES. 229 



sprinkled with small white scales. Clypeus (as in the males of this division) deeply 

 concave, with the sides oblique and diverging anteriorly, margin broadly reflexed, 

 truncate in front, and reddish ; vertex with long yellowish hair. Antennae ferruginous, 

 club much longer than the head. Thorax nearly three times wider than long, sides 

 rounded and oblique, not narrowed towards the base, margin reddish, disc with a 

 dorsal channel which being clothed with denser white scales forms a narrow vitta, 

 another short interrupted vitta is seen each side, but in one specimen is very indis- 

 tinct ; the disc near the anterior margin is furnished with a few long hairs ; the sur- 

 face is shining and sparsely punctured ; the posterior margin is fringed with long hair. 

 Scutellum with a white medial line. Elytra shining sparsely punctured, with a very 

 narrow sutural line, and a short basal vitta inside of the humerus more densely clothed 

 with white scales, the vitta disappears in one specimen. Abdomen clothed with small 

 white scales more condensed at the posterior margin of the segments, anus ferruginous. 

 Pectus clothed with dense long hair, legs ferruginous ; anterior tibiae armed with three 

 acute teeth. 



2. P. ca v ifron s, oblongo-cylindrica, fusco-ferruginea, pube brevi pallida squamulosa parce vestita, 

 thorace lateribus rotundatis, utrinque angustato, sulco dorsali, plaga utrinque basali densius pubescen- 

 tibus, margine basali brevius fimbriate, elytris rugosis obsolete tricostatis et vix vittatis, sutura paulo 

 densius pubescente. Long. *9. 

 Le Conte, Proc. Acad. Nat. Sc. Pbilada., 7, 222. 



Sonora, Dr. Webb, and Mr. Schott, of the U. S. and Mex. Boundary Commission. 

 Only males were procured. This species is slightly more cylindrical than the preced- 

 ing, being about the same size and form as P. variolosa, of a reddish brown color and 

 with a thin covering of short depressed yellow hair ; the thorax is however of a dif- 

 ferent shape, being about two times wider than long, much rounded on the sides, and 

 narrowed both in front and behind, the disc is moderately densely punctured, channeled, 

 with the sides, dorsal vitta and basal spots more densely pubescent with fine short 

 yellowish hair like scales. The anterior part of the disc has a few longer hairs, and 

 the posterior margin is fringed with not very long hair. The head is formed as in 

 the preceding, sparsely clothed with short yellowish hair, with longhair on the vertex; 

 the antennas are paler ferruginous with the club not much longer than the head. The 

 elytra are finely rugous, not very shining, with three faint costae, which appear with 

 the suture more densely pubescent. The abdomen is densely clothed with yellowish 

 scale like hairs, the pectus as usual with long yellow hair. The anterior tibiae are 

 armed with three acute teeth. 



3. P. subvittata, cylindrica ferrugineo-testacea, parce pallide squamosa, thorace lateribus fere angu- 

 latis, utrinque angustato, canaliculate, trivittato, elytrorum sutura vittisque minus distinctis utrinque 

 tribus albo-squamosis, vitta externa ambiente. Long. 1-10. 



One mutilated male found by Mr. A. Schott on the Rio Grande, Texas. More 



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