EXOPEOSOPA. 85 



infuscated, the brown colour limited by the fourth vein before the anterior cross-vein, 

 and filling the marginal cell (except its distal end) encroaches on the inner submarginal, 

 reaching the tip of the first vein ; the posterior cross-vein is very slightly clouded ; the 

 first posterior cell is closed, its petiole being almost as long as the posterior cross-vein. 



I have before me four males and two females from Ventanas, and three specimens 

 from Prof. Bellardi's collection. The cross-band on the second segment in these 

 last-named specimens is broader than in the others. 



N.B. — The venter in some specimens has a dense covering of yellowish- white 

 appressed hairs, and longer, erect hairs of the same colour between them ; in other 

 specimens the prevailing colour of the hairy covering is black, or at least the black 

 ground-colour is distinctly visible among the scattered whitish hairs. I do not know 

 what to make of these differences. 



Macquart's description is rather unmeaning, the "noir bleuatre" of the abdomen 

 is almost imperceptible; nevertheless the figure he gives of the wings renders the 

 identification almost certain. The E. argentifasciata, Macq. Suppl. i. p. 109 (Colombia), 

 also very insufficiently described, seems to be a closely allied species. 



6. Exoprosopa procne, sp. n., 2 . 



Closely allied to E. limbvpennis, but nevertheless different. The antennal style is, comparatively, a little 

 shorter, that is, a little more than half the length of the third joint; the colour of the body is darker, 

 more decidedly black ; the tufts of hair on the sides of the thorax more rufous ; the scaly hairs along the 

 lower occipital orbit more golden ; the tufts of hair at each end of the yellowish-white cross-band of the 

 second segment are white ; the rest of the abdomen is deep black, covered with a black, scaly tomentum ; 

 an elongate silvery spot at each end of the anterior margin of the fourth segment ; segments 6 and 7 with 

 silvery cross-bands (in the male they are probably altogether silvery) ; on the venter a silvery spot on the 

 penultimate segment. Wings like those of E. limbipennis in coloration and venation, only the second 

 basal cell is a little more brownish. 



Length 15 millim. 



Eab. Guatemala, Coatepeque 1300 feet (Champion). A single female. 



The most striking difference between E. procne and E. limbipennis is in the coloration 

 of the abdomen, the fourth segment of which, instead of having a whitish cross-band, 

 shows only beginnings of a silvery one on each side. 



7. Exoprosopa anthracoidea. 



Exoprosopa anthracoidea, Jaennicke, Neue exot. Dipt. p. 32, t. 2. f. 18 (1867) . 

 Exoprosopa trabalis, Loew, Cent. viii. $ 20 (1869) 1 . 



Hab. Mexico, Jalapa l . 



Loew's description together with Jaennicke's figure will be sufficient for the recognition 

 of this species. I have a specimen before me from Jalapa which I have compared with 

 Loew's type. 



The scales of the last abdominal segment, which Loew describes as white (he had 



