300 Mr. K. J. Morton on 
olive-brown, each segment with a lateral salmon-tinted sub- 
crescentic portion. 
B.-T. writes, June 10th: “ This species is becoming 
common. More restless than the other brown dragon-fly and 
does not take possession of a definite perch. Some males are 
browner red than the typical glowing red, which is most 
beautiful. Rather wary and flits from grass to grass by the 
side of water.”” The brown dragon-fly alluded to appears to 
refer to a condition of Trithemis annulata. 
Crocothemis servilia, Brullé. 
249 9,11 2 9, 7. v., 14-17. v., 25. v., 1-10. vi. (Basra). 
The shoulder-stripe has only become faint in a few of the 
most mature examples. 
In attempting to arrive at a more satisfactory understanding 
regarding the distinctive characters of these species of €vaco- 
themis, a partial study of the genitalia of the second abdominal 
segment of the male has been made by removing the parts 
from a number of specimens and mounting them in balsam. 
The results may be briefly summed up as follows :— 
(1) The preparations confirm the accepted view that the 
outer branch of the hamule is more pointed in C. erythrea 
than in C. servilia, in which it is more truneate. These flat 
preparations, however, do not give an altogether satisfactory 
idea of the form of the branch, the position being not quite a 
natural one. The shape is: better understood when the 
hamule is viewed from the side. 
(2) The apex of the inner branch of the hamule appears to 
be different in the two species. In the Madagascar prepara- 
tion of C. erythrea (Pl. XIV. fig. 3) the extreme apex is seen 
to be slightly notched with a strong subapical tooth. After 
examination of a number of dried specimens of C. erythrea 
from widely separated localities, I can say positively that in 
these the toothed or bifid condition is invariably present, and 
it is interesting to mention that an example from Cherra- 
punji in my collection included by Ris (Coll. Selys, p. 540) 
under C. servilia as transitional towards C. erythrea is, 
in respect of the hamule, true C. erythraa. The evidence 
regarding C. servi/ia should perhaps be stated in a more 
negative form. In none of the examples of C. servilia 
examined have [I been able to confirm the existence of any 
tooth, the apex apparently being always simple. These 
critical characters are, however, somewhat elusive, and unless 
the hamule is in exactly the right position the tooth may be 
overlooked. In the preparation from which fig. 1 (Pl. XIV.) 
