490 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.37. 



to examine them. This he kindly did, and, finding my doubts ap- 

 parently confirmed, sent them on, with other West Indian material, 

 for investigation. The present paper presents the results, all the 

 species described being in the U. S. National Museum. 



1. Group VIBRISSATI. 



This group, so abundantly represented on the mainland, seems to 

 be wholly absent in the West Indies. 



2. Group SEEICEI. 



A single species, very close to the abundant South American A. 

 nigromarginata. 



AUGOCHLORA PISCATORIA, new species. 



Brilliant blue-green, the abdomen in the male becoming a pure 

 purple-blue; smaller than A. nigromarginata, the length of the ante- 

 rior wing about 6f mm. (in nigromarginata 8 to 9^); hind spur with 

 four stout spines (six in nigromarginata, according to a specimen in 

 the British Museum, but four on one side and five on the other in a 

 Brazilian specimen from Smith's collection) ; male with last antennal 

 joint hooked, and large fish-tail process, covered with white pubes- 

 cence, arising from beneath margin of third ventral abdominal seg- 

 ment. The female, compared with A. nigromarginata from Brazil, 

 is much bluer, with much shorter and scantier hair on the head and 

 thorax, and the abdomen is very shiny and feebly punctured, this 

 being especially noticeable on the first segment, although in the male 

 this is strongly punctured. The wings in both sexes are very dusky 

 and strongly reddish; the first recurrent nervure enters the base of 

 the third submarginal cell, or joins the second transverso-cubital a 

 little on the outer side. The more ample wings of A. nigromarginata 

 are by no means so dark. The short hair of the head (except the 

 cheeks) and dorsum of thorax is nearly all black or dark fuscous in 

 both sexes; in A. nigromarginata it is much less so. The tegulae are 

 considerably darker than in A. nigromarginata. The hind margins 

 of the abdominal segments, as in nigromarginata, are black. One of 

 the males is unusually large and blue, but evidently conspecific. 



Habitat. — St. Vincent, West Indies {E. H. Smith); 11 females, 

 7 males. This is evidently an insular representative of A. nigro- 

 marginata, sufficiently differentiated to be considered a distinct 

 species. It is, I suppose, the insect reported by Ashmead as A. regina. 



According to Vachal, the Mexican A. hinghami Cockerell (male) 

 is the same as ^4. nigromarginata. It is certainly very closely allied, 

 but it differs from both nigromarginata and 'piscatoria by having the 

 mandibles dark, and only the upper half of the labrum pallid. The 

 male flagellum of hinghami is obscurely reddish beneath; in nigro- 



