Odonata from the West Indies. 267 



Wings clear hyaline ; pterostigma yellowish, between 

 dark brown nervures : hind wings stained with yellow 

 at the base ; membranule small, brownish grey, with a paler 

 line towards the upper end. 



2 St. Vincent. 



" Grand Sable, Windward. Pools near sea, Jan. 4." 



3 Grenada. 



Nos. 106 and 213. 



" Near Mount Maitland, Sept. 13. Leeward, 600 feet. 

 Open hillside." 



12. Micrathyria cequalis. 

 Dythemis cequalis, Hag. Neur. N. Amer. p. 167 (1801). 



I believe I have correctly identified this species. The 

 triangle of the fore wings is untraversed, and there are two 

 rows of subtriangular cells, followed by three increasing. 



3 Grenada. 



" 3rd coll. no. 74." 



" One pair taken in coitu." 



13. Micrathyria (?) pruinosa, sp. n. 



Exp. al. 50 millim. ; long. pter. 3 millim. 



Male. — Head : frontal tubercle strongly bifid in front, 

 violet-blue, as are also the upper lobes of the clypeus, except 

 at the sides ; face yellowish white ; mandibles, suture of 

 labrum, and occiput black, the latter with two yellow spots on 

 each side ; prothorax and pleura bronzy green, with two 

 lateral yellow lines converging behind, on the front two thirds 

 of the prothorax; median line very slightly marked, but 

 commencing at a small yellow crescent in front ; sides and 

 hinder edge of prothorax bordered by a pale yellow zigzag 

 line; pleura with three broad pale yellow stripes, the first 

 slightly contracted in the middle and broadest below, the 

 third broader than the second ; interalary space above and 

 base of abdomen, which is inflated, pruinose blue, except the 

 sutures. Under surface pruinose bluish grey, segments 2 to 

 4 of abdomen slender, black, with a long pale yellow lateral 

 spot on the sides of each at the base ; those at the base of 

 the second segment least marked, but divided by the carina ; 

 the remaining segments missing. Wings clear hyaline ; 

 pterostigma dark reddish brown, between black nervures: 

 fore wings with 11 antenodal and 9 or 10 postnodal nervures, 

 the last antenodal and first two postnodais not continuous ; 

 triangle rather broad, traversed, followed by one row of three 

 cells and five or six of two, followed again by three ; no loop- 



