Vol. XXviii] ENTOMOLOGICAL NEWS. 247 



10 are distinctly paler, light yellow, in the lower half; usually 7 to 10 

 are obscure brown or dull orange. Ventral suture as in the male. No 

 trace of a vulvar spine. 



Legs cream colored or very light brown, similar to the male, but the 

 femoral stripes wanting or faintly represented on the last femora only. 



Wings similar to the male. 



British Guiana : Georgetown, January 25 and 26, and Feb- 

 ruary 18, 1912, 19 S, and 7$ ; Wismar, January 30, 1912, i 

 S ; types, a $ and 9 , January 26, in my collection. 



In the Botanic Gardens at Georgetown in January, 1912, 

 many of the pools were dried up and all canals and pools were 

 at a very low water stage. Just a short distance from one of 

 the main drives was a pool grown up with Nelumho, into which 

 pool a very small stream of water trickled. Demararnm was 

 along this thread of water for a short distance back from the 

 pool, and about the pool near the mouth of the stream. Their 

 flight was rather slow and heavy. 



Specimens of this species were sent to Dr. Calvert and Dr. 

 Ris for examination. Both regard it as undescribed. The 

 following species, other than those here figured have been re- 

 ferred to Leptagrion : inca Selys, inornatuin Selys, obsoletiim 

 Selys, pcrlonf/um Calvert, rufnm Selys. Inca is known from 

 an imperfect S and 2 $ ; demararnm is distinct from it, among 

 other characters, by the rear of the head entirely pale and by 

 the absence of a post-humeral black band. Inornatum is known 

 from a single 9 ; dcmararmn is distinct from it, among other 

 characters, by the very different stigma, by having the labrum 

 and rhinarium not shining black, and by the thorax having a 

 middorsal dark stripe. Obsoletiim is known from a single S 

 and 9 ; demararum is distinct from it, among other characters, 

 by the color of the vertex, and of segments 7-10 of the $ ,. 

 and by the form of the S appendages. P erlongum is known 

 from a single $ , supposedly close to porrectum, and having 

 the abdomen 64 mm. in length, more than twice the length of 

 demararum. Rufum is known from a single S lacking the 

 last 4 abdominal segments ; demararum is distinct from it, 

 among other characters, by the almost totally red coloration of 

 head, thorax and abdomen of riifitm. 



