60 PROCEEDINGS OF THE NATIONAL MUSEUM vol. loi 



differs from both cubensis and portoricensis in being so densely punc- 

 tate as to present a network of lines over the occiput. The thorax 

 also is very densely and rather finely punctate without any ridgings 

 or rugosities. 



MYOCHROUS JAMAICENSIS Blake 



Plate 7, Figure 3 

 Myodiroiis janiaicensis Blake, Proc. Ent. Soc. Washington, vol. 49, p. 26, 1947. 



About 6 mm. in length, elongate oblong, shining piceous black, 

 covered by pale scales; thorax densely punctate, with the punctures 

 somewhat elongate and in short lines, giving the surface a slightly 

 ridged effect, but not so deeply ridged as in cubensis. 



Head covered with scales down to the antennal sockets, beneath the 

 scales a poorly defined median line down front and dense coarse punc- 

 tures making surface rugose, lower front finely and sparsely punctate ; 

 the usual occipital ridges on each side. Antennae reddish brown, of 

 the usual proportions. Prothorax wider than long, moderately con- 

 vex, with three well-developed lateral teeth and the usual apical and 

 basal teeth ; a depressed line along the basal margin most pronounced 

 over the scutellum ; surface densely and rugosely punctate, the some- 

 what elongate punctures occurring in short lines, often confluent, but 

 not forming such deep ridges as in cubensis. Elytra with a slight 

 basal callosity and faint transverse depression below; the rows of 

 punctures closely placed and not very coarse or with transverse ridg- 

 ings. Body beneath with the first abdominal segment rather finely 

 punctate. Hind femora bluntly toothed, anterior tibiae with the 

 usual tooth. Length 6 mm. ; width 2.7 mm. 



Type.— A female, U.S.N.M. No. 57997. 



Type locality. — Manchioneal, Jamaica, collected January 30, 1937, 

 by E. A. Chapin and K. E. Blackwelder. 



Remarks. — M. jamaicensis appears to be halfway between the Cuban 

 and the Hispaniolan species. Although there is a tendency toward 

 ridging on the thorax, the ridges are not so dense or so deeply cut 

 and the punctation is not so close as in cubensis. Tlie thorax is not 

 so heavy as in cubensis., in this respect resembling that of Mspaniolae. 



MYOCHROUS CUBENSIS Blake 



Plate 7, Figure 4 

 Myochrous cnhensis P>lake, Proc. Ent. Soc. \Yasbington, vol. 49, p. 23, 1947. 



From 4.5 to 6 mm. in length, elongate oblong, shining dark brown 

 to piceous black, beneath the short, pale, not closely appressed scales ; 

 prothorax coarsely and rugosely punctate, with the elongate punctures 

 often confluent and forming ridges; elytra moderately finely and 

 densely striate punctate. 



