BEETLES OF THE GENUS MYOCHROUS — BLAKE 57 



toothed, with moderately dense, not coarse punctures ; legs unusually 

 long, reddish brown. 



Head with a median line down occiput and the usual ridge on each 

 side, surface somewhat rugose, covered by scales down to antennal 

 sockets, lower front with fewer and finer scales. Antennae reddish 

 brown, of the usual proportions. Prothorax wider than long, with 

 three distinct lateral teeth, not very convex, but rounded over the 

 middle, without depressions except along the basal margin; beneath 

 the pale brown and grayish scales the surface moderately densely but 

 not coarsely or rugosely punctate. Elytra two and a half times as 

 long as thorax and considerably broader, with a distinct basal callosity 

 on each side of the scutellum and behind this a slight transverse de- 

 pression ; striate punctures rather fine and not closely placed and be- 

 coming finer toward the apex, the short, coarse scales completely hiding 

 the punctation and forming a pale mottled covering. Body beneath 

 shining under the sparse pale scales, first abdominal segment rather 

 sparsely punctate. Hind femora not distinctly toothed, anterior 

 tibiae with a tooth on the inner side ; tibiae unusually long. Length 

 5.3 to 6 mm. ; width 2.5 to 2.7 mm. 



Type.— A. male, U.S.N.M. No. 59029, collected in May 1925 by G. L. 

 Harrington. 



Type locality. — Chuani, Department of La Paz, Bolivia. 



Other localities. — Colombia: Cali (Rosenberg; in Bowditch col- 

 lection) ; Peru : Chira ; Bolivia : Huachi, Department of La Paz 

 (June 1925; G. L. Harrington) ; Brazil: "Amazon," first Jacoby col- 

 lection, Bowditch collection; Amazon River, Arary to Manaos; near 

 Obidos (Holt, Blake, and Agostini) ; Venezuela (from culm of 

 "guasduz"), Orinoco River near Mapiri, state of Bolivar (F. A. 

 McClure) . 



Remarks. — This species is characterized by its short, even, scaly cov- 

 ering that completely hides the coppery or bronzy surface below, and 

 by the rather long tibiae and the broad prothorax, which is rounded in 

 the middle. 



MYOCHROUS MAMORENSIS, new species 



Plate 8, Figure 5 



About 5.5 mm. in length, oblong oval, reddish brown, mottled with 

 broad, dense, yellow and brown scales; thorax densely but not very 

 coarsely punctate, with 3-toothed margin, and anterior margin pro- 

 jected over the head ; thorax about half as long as elytra and a little 

 Avider than long. 



Head covered by scales concealing the rough, denselj^ and obsoletely 

 punctate surface beneath, a median depression becoming a median 

 ridge in the lower frontal transverse depression ; scales between anten- 

 nal sockets short and fine and transversely placed. Antennae of the 



