CALVERT: MACROTHEMIS AND ITS ALLIES. 
315 
4. B. grenadensis Kirby. Kirby, Ann. mag. nat. hist., (6), 
vol. 14, p. 265, 1894. 
I have not seen this species, which was described from the Island 
of Grenada, West Indies, unless a male from Chiriqui, sent me 
once by Mr. C. C. Adams for identification, belongs here. 
This Chiriqui male had the vertex and frons superiorly dark 
metallic blue, sides of the thorax dark brown with three uninter¬ 
rupted green stripes, labrum lost, labium yellow unspotted, genitalia 
most like those of nubecula , wings hyaline, very pale yellow in the 
basal half, triangles free. Front wings with 14 antenodals, 8 post- 
nodals, two posttriangular rows almost to the level of the nodus. 
Hind wings with ten antenodals, 9-10 postnodals. Pale spots on 
7 resembling those of pertinax and of praecox. Teeth on the third 
femora five in number, confined to the apical half. Abdomen about 
30 (4th segment lost), hind wing 29, pterostigma 2 mm. 
5. B. praecox Hagen. PI. 2, figs. 25, 29. 
JJythemis p. Hagen, Syn. Neur. N. Amer., p. 164, 1861.* 
The type, a female, has the frons above and vertex metallic blue, 
lips yellow; vulvar lamina bilobed, lobes rounded and approximated 
PI. 2, fig. 29; wings smoky yellow throughout, the longitudinal 
veins and some of the cross-veins, from the base to the distal end 
of the triangle, bordered with brownish yellow. 
The males which seem to be conspecific have, in some, the free 
margin of the labrum bordered with black, the inner third or less 
of the lateral labial lobes black, liamule sickle-shaped similar to that 
of mendax , wings very pale yellowish throughout, hardly darker 
than the extreme base of the hind wings. Here probably belongs 
JJythemis columba Hagen, Syn. Neur. N. Amer., p. 317, 1861 (no 
description), differing only in its smaller size, fewer cross-veins (the 
lower figures of those which follow are those of columba ), and 
straigliter hamule. 
Front wings with 11-13 antenodals, 5-9 postnodals; in two 
males from Mexico and the tjq)e of columba the two posttriangular 
rows reach to the level of the nodus. Hind wings with 8-10 ante¬ 
nodals, 7-10 postnodals. 
Abdomen $ 36.5-38, 9 37; hind wing $ 31-35; pterostigma 
2-2.5. 
Distribution. Mexico: one female by Thorey, Hagen’s type 
(M. C. Z.); two males, one female Cuernavaca, October, 1897, by 
0. W. Barrett (collections P. P. Calvert and C. C. Adams). 
