370 On a new Species of Eupetomena. 



ventral processes, on the other) there is a series of intermediate 

 forms, which bridge over the apparent gaps. 



The bristles are very feebly developed in the Irish forms ; 

 and from these it is but a brief step to their total vanishing 

 in Linotrypane. A similar tendency to the disappearance of 

 the bristles occurs in a new and remarkably elongated Ammo- 

 trypane recently brought by Dr. Gwyn Jeffreys from a depth 

 of 1750 fathoms, while dredging in H.M.S. ' Valorous.' The 

 segmentation in this annelid is only indicated by the very 

 minute bristle-tufts, which are invisible to the naked eye, so 

 that, from the dorsum, it resembles a large Linotrypane. 



I am, Gentlemen, 

 Murthl Your obedient Servant, 



October 8, 1875. W. C. M'LnTOSH. 



LI. — On a new Species of the Genus Eupetomena. 

 By John Gould, F.K.S. 



I am indebted to Mr. Henry Whitely for the opportunity of 

 describing, through the 'Annals,' a fine species of humming- 

 bird which has just arrived in this country. This new bird 

 (E. hirundo) is very similar to the Eupetomena macroura, and 

 is the western representative of that bird on the great con- 

 tinent of South America. 



The new bird differs from the old by having a shorter tail, 

 the feathers of which are broader and less rigid ; the wing, on 

 the other hand, is larger and longer. In colour, while the 

 E. macroura is always blue on the head and breast, the new 

 species is distinguished by these parts being washed with green. 



The following is a correct description of E. hirundo : — 

 Head and throat deep blue, with a wash of green on the crown ; 

 body both above and beneath green ; wings, tail, and under- 

 coverts steel-bluish black ; bill jet-black. Female similarly 

 coloured to the male. ; but the outer shaft of the wing is not 

 enlarged as in the male, where the stem of this feather is 

 dilated as in E. campyloptera. Total length 6| inches, bill |, 

 wing 3g, tail 3g. 



Mr. Whitely found numbers of this bird flying over the 

 open plains in pursuit of insects. He says, " they rarely ap- 

 proach a flower, but appear to take their food hawking about 

 in the air in the manner of swallows — in fact, at first sight 

 might be easily mistaken for those birds." 



Habitat. Huiro, in the Valley of Santa Ana, Peru (eleva- 

 tion 4800 feet). 



