l70 AMERICAN COLEOPTERA. 



EXPLANATION OF PLATE III. 



Fig. 1. — Phseochroux Behrensii, Horn. San Francisco, Cal. 



Fig. 2. — Acratus Jlavipennis, Horn. Arizona. 



Fig. 3. — Lasiopus ferrugineus, Lee. (Synopsis of the Melolonthi- 

 dse of U. S., Jour. Acad. 1856, p. 282.) Tlie ungues of this insect 

 are simple and the tarsi very much longer than the tibiae. The ante- 

 rior tibia is without spine. Antennoe nine-jointed, palpi slender. Cly- 

 peus rounded, concave and subemarginate at apex. Its surface is mo- 

 derately glossy and ferruginous in color, coarsely punctured and with 

 sparsely placed short hairs, the margin is fringed and the under sur- 

 face with longer hairs. Ringgold Barracks, Texas. 



Fig. 4. — Oncerus floralis, Lee. (Loc. cit. p. 28H.) As in the pre- 

 ceding species the anterior tibiae are without spine, the tarsi long and 

 the femora thickened. Clypeus flattened, parallel, and with a lateral 

 incisure and transverse suture forming a double clypeus. The claws 

 are deeply cleft as in Acratus. The head and thorax are shining black, 

 the elytra brownish testaceous and sparsely clothed with short pale 

 hairs. Vallicito, California. 



Fig. 5. — Hypotrkhia spi&sipcs, Lee. (Class. Col. N. A., 137.) 



Fig. 6. — Plectrodes p7ibescens. Horn. Visalia, Cal. 



Fig. 7. — Macropnus crassijtes, Horn. (Proc. Acad. 1866, 307.) 

 Though not mentioned in the preceding Papers, I introduce this in- 

 sect for the opportunity aiforded of figuring it. A view of its upper 

 surface hardly affords any difference of outline from the common Areo- 

 dae, except in being rather more suddenly broader. Honduras. 



Fig. 8. — Fseudoviorpha Cronkhitn', Horn. Owens' Valley, Cal. 



