24 PROCEEDINGS OF THE NATIONAL MUSEUM vol. loi 



somewhat flat, the head with a dark band at base, sometimes the 

 tubercles darkened and moiithparts dark. Antennae longer than 

 usual, dark, with the three basal joints pale edged. Prothorax 

 scarcely twice as wide as long, moderately convex, with rounded sides, 

 not much evidence of basal depression; finely alutaceous, pale, with 

 from two to five more or less distinct dark spots, or in some specimens 

 the spots very indistinct or lacking. Elytra moderately convex, less 

 oblong and more rounded than in many species, finely alutaceous, a 

 narrow dark sutural and submarginal vitta uniting at apex more or 

 less distinctly, the median vitta not very wide; epipleura usually dark 

 edged. Body beneath with breast usually dark and a dark streak on 

 femora, or the apex dark, tibiae and tarsi dark. Length 5.5 to 8 mm., 

 width 2.8 to 3.8 mm. 



Type: In MCZ (LeConte collection), from Texas and New Mexico, 

 Other localities: United States: Alabama, Missouri, Texas, 

 Arizona. Mexico: Cuernavaca, Morelos, Wickham; Chiapas, Wick- 

 ham; Delicias, Chihuahua, C. and P. Vaurie; Mexico City, Hoge; 

 Paso de Telago, San Kafael, Jicaltepec; Vera Cruz; Tabasco; Tuxpan, 

 Jalisco; Villa Lerdo, Durango, Hoge; Las Parras, Baja California, 

 W. M. Mann; 20 miles north of Comondu, Baja California, Mickel- 

 bacher and Ross. Guatemala: Acatenango, i\.ntigua, I. E. Melhus; 

 Chimaltenango, Nebaj, 6,000 ft., C. and P. Vaurie; Quirigua, W. P. 

 Cockerell; Salamo, C. and P. Vaurie; Senahii, Alta Verapaz, Paul 

 Haase; Yepocapa. Honduras: La Ceiba, F. J. Dyer; Tegucigalpa, 

 F. J. Dyer. Costa Rica: Cartago, Agua Caliente, F. Nevermann; 

 Guayabillos, southwest slope of Volcan Irazu, 2,200 m., F. Never- 

 mann; Navarro, W. R. Maxon; San Jose, F. Nevermann, Schild and 

 Burgdof, M. Valerio; San Pedro de Montes de Oca, C. H. Ballou, on 

 Jacaranda. 



Remarks: In ni}^ earlier revision of the species of Disonycha north 

 of Mexico, I \vrote at length of the confusion concerning the name for 

 this species, and of Jacoby's treatment of it. Jacoby appears never 

 to have recognized LeConte's species and to have confused the various 

 color forms as much as did Schaeffer. One of these color forms that 

 I did not treat in my earlier revision because I did not have access to 

 the type is the one that Jacoby described as Disonycha labioM. Mr. 

 J. Balfour-Browne has sent me a specimen he has compared with the 

 type, a male; it is a pale form of D.fumata LeConte without pronotal 

 spots but otherwise corresponding. The determining characters of 

 this slender oval species are the long antennae, the long narrow head 

 with dark labruin, and the long narrow prothorax. The head is often 

 sparsely pubescent above, a condition rather unusual in the genus. 



