238 Mr. T. D. A. Cockercll — Descriptwus and 



ol)lique light. Abdomen sliinino-, basal transverse depressions 

 ot second and third segments very deej) ; segments 1 to 5 

 with narrow, entire, white hair-bands; fifth segment with 

 short but coarse black hair before the band ; sixth segment 

 dorsally rugose, not tonientose, but with erect black hairs, the 

 a])ical keel strongly bilobed, the large subtriangular lobes 

 convex on outer margin and slightly concave within, tlie 

 whole suggesting the opened mouth of some bird or fish; no 

 subapical ventral armature. 



Trinidad, West Indies, June 6 [A^.tg. BuscJc). U.S. 

 National Museum. 



A very distinct little species, superficially like M. multidens^ 

 Fox, from Jamaica, but structurally quite different. Tiie 

 obscure reddish stigma is quite well developed, whereas tliat 

 of mnltidens is obsolete. 'J'he real affinity seems to be with 

 such species as M. disparipenms, Ckll., from Texas, and 

 M. pei-punctata, Ckll., from Mexico. These latter have the 

 darkening of the marginal cell and adjacent parts much more 

 intense. 



MegacMle IwlomeJcena, sp. n. 



5 . — Length 12 mm. ; anterior wing 8 mm. 



Black, robust, the body and pubescence entirely black, tlie 

 flagellum very obscurely brownish beneath ; mandibles 

 broad, obtusely quadridentate ; clj-peus short and broad, 

 densely punctured but glistening, the lower margin in middle 

 smooth and polished, the edge straight and without any 

 denticle; supraclypeal area smooth and shining in middle ; 

 mesotliorax very finely and closely punctured, not shining ; 

 seutellum shining on disc, but well punctured ; tegulre black. 

 Wings brownish h} aline, a dark shade along costal side of 

 marginal cell. b})urs of anieiior tibige red. Abdomen 

 shining, last vential segment truncate-subemarginate. 



Chubut, Patagonia (from W. F. H. Eosenberg). U.S. 

 National Museum. 



The hair on inner side of tarsi is black, not red as in 

 M. chuhutatia, Schrottky. The insect is smaller than 

 jU. -melandwUca, Joerg., the wings are not yellowish, and 

 the abdomen is much more hairy dorsally, especially toward 

 the base. 



MegacJiile atramentata, sp. n. 



$ . — Length 12 mm. ; anterior Mnng 9 mm. 

 Black, robust, the body, antennae, and tegulse wholly 

 black ; the pubescence black, very obscurely reddish on inner 



