52 PROCEEDINGS OF THE NATIONAX, MUSEUM vol. loi 



strongly convex, as long as wide, with three minute lateral teeth, punc- 

 tation dense and moderately fine, not confluent ; elytra narrowly elon- 

 gate. 



Head covered by pale scales down to antennal sockets, the underly- 

 ing punctation not visible, a faint depressed median line, and faint 

 trace of occipital ridging in one specimen. Antennae orange brown, 

 of the usual proportions and rather long. Prothorax as long as wide, 

 smoothly and strongly convex, with a slight depression along basal 

 margin, the sides feebly rounded, almost straight, armed with three 

 minute teeth, and the usual basal and apical tooth ; punctures dense but 

 not confluent and not very coarse, surface not at all ridged. Elytra 

 with small basal callosities and a transverse depression below ; striate 

 punctures moderately coarse in basal half without transverse ridging, 

 almost completely hidden by the broad, pale, closely appressed scales. 

 Body beneath less densely scaly, the abdomen with fine hairs, and the 

 first segment finely punctate. Hind femora not distinctly toothed ; an- 

 terior tibiae with small tooth on inner side. Length 4.9 to 5.0 mm. ; 

 width 2.3 mm. 



Type and paratype. — Type in the British Museum, Baly collection; 

 one paratype, U.S.N. No. 59136. 



Type locality. — ? Pampas, Argentina. 



ReTYiarks. — The British Museum has other specimens that I have 

 not examined, presumably of this species. The old handwritten label 

 on the two specimens that I have examined is faded and nearly illegi- 

 ble but it appears to be endorsed "Pampas." The beetles have a shape 

 similar to that of the North American species M. longulus LeConte, 

 being unusually narrow and elongate. The aedeagus is much longer 

 than in that species and it has a longer tip. 



MYOCHROUS MONROSI, new species 



Plate 6, Figure 6 



Approximately 6.5 to 7 mm. in length, oblong, reddish brown, cov- 

 ered by pale brownish scales, prothorax as long as wide and nearly as 

 wide as elytra, strongly convex, with three small sharp lateral teeth, 

 densely and moderately coarsely punctate; elytra with dense, coarse 

 punctation. 



Head beneath the scales rough, with coarse shallow punctation, a 

 faint medium vertical line, the usual ridge on either side of occiput not 

 well developed. Antennae of the usual proportions. Prothorax 

 fully as long as broad, strongly and evenly convex with nearly straight 

 sides having three small sharp teeth not very conspicuous and with an 

 unusually small apical and basal toothing; a slight basal depression 

 over the scutellum and a thickening along the anterior margin over 

 occiput ; surface densely and shallowly punctate, the punctures tending 

 to be elongated and in lines with interspaces alutaceous, not at all 



