8 PROCEEDINGS OF THE NATIONAL MUSEUM vol.86 



face beneath strigulose. Antennae about as long as head and pro- 

 thorax; segments 8-10 about as wide as long, eleventh not equal to 

 ninth and tenth together. Maxillary palpi long and slender, last 

 segment nearly twice as long as third, as large at base, freely conical. 

 Pronotum shining, impunctate, but distinctly strigulose. Mesoster- 

 num strongly carinate- Elytra punctate ^ and strongly strigulose; 

 not impressed at the sides ; epipleurae free but inflexed far above the 

 horizontal position. Abdomen feebly margined ; coarsely but sparsely 

 punctured throughout and strigulose. Eighth tergite of male with 

 four slender lobes, tlie median pair longer and separated by a trian- 

 gular incisure; eighth sternite witli an acute triangular notch, about 

 as wide as deep, angles produced into slender lobes. Eighth tergite 

 of female with four long slender lobes, the median pair a little longer, 

 all separated by acutely rounded excisions wider than the lobes; 

 eighth sternite with six lobes, the two median pairs long and slender, 

 the middle pair armed each with two curved spinules, the others 

 bearing each a long black seta. 



Type locality. — Camp Grant, Ariz. 



Lectotype. — Acad. Nat. Sci. Philadelphia no. 3140. A male labeled 

 "Ariz." 



Localities represented. — Specimens from the following additional 

 localities have been seen: Arizona (Tucson), California, and Texas. 



Remarks. — This species is almost certainly involved in the syn- 

 onj^my of the tropical American species fiavipalpis Sharp, ventralis 

 Sharp, gravidus Sharp, ignavus Sharp, rotundatus Sharp, elatus 

 Erichson, and convexus Erichson. 



COPROPORUS ARIZONAE. new species 



Piceous; antennae, trophi, legs, and sides of pronotum testaceous. 

 Head transverse, triangular in front; smooth, shining, impunctate 

 above; gula wide, but short and rapidly narrowed posteriorly. An- 

 tennae nearly as long as head and prothorax, segments not transverse, 

 eleventh subequal to ninth and tenth together. Maxillary palpi stout, 

 fourth segment slender, small at base and one-half longer than third. 

 Pronotum shining, impunctate, but with exceedingly minute surface 

 irregularities. Mesosternum strongly carinate posteriorly, the carina 

 forming a thin lamella between the coxae and ending abruptly over 

 the apex of the metasternum. Elytra shining, with surface slightly 

 uneven, but not punctate ; * without concavity at the sides, but gen- 

 erally flattened, especially posteriorly ; epipleurae inflexed very close 

 to inner face of elytra. Abdomen feebly margined; sparsely and 



» The punctures are frequently obscured by the convergence of the strigulae. 

 *With low magnification the elytra appear to be minutely punctured, but with the 

 highest magnification obtainable they are seen to be merely slightly uneven. 



