1902.] DRAGOXFLIES OF THE " SKEAT EXPEDITIOlSr." 69 



strongly curved sectors and in having three or four cross nervules 

 in the submedian space of fore and hind wings. 

 A single specimen, a male, from Kwala Aring. 



POTAMARCHA OBSCURA (Ramb.). 



Potamarcha obscura^ Kirby, Cat. Odonata, p. 180. 



Potamarcha congener, Selys, Ann. Mus, Genov. (2) x. p. 459. 



Potamarcha obscura, Karsch, Abh. v. d. Senckenberg. nat. 

 Gesell. XXV. 1. p. 219. 



This species is common at Kwala Aring, where I took two 

 females and several males. Closely allied to Lathrecista, it differs 

 in having the eighth abdominal segment in the female dilated, and 

 the triangle of the hind wing traversed. (See also Selys, loc. cit.) 



Lathrecista terminalis Kirby. 

 Lathrecista terminalis, Kirby, Cat. Odonata, p. 30. 

 A single male from Kwala Aring. Recorded and described 

 from Borneo. 



♦Lathrecista simulans (Selys). 



Lathrecista simulans, Kirby, Cat. Odonata, p. 30 ; Selys, Ann. 

 Mus. Genov. (2) x. p. 458. 



Recorded from Borneo, Sumatra, Ceylon, Malacca, and Burmah. 



*Agrionoptera lineata Brauer. 



Agrionoptera lineata, Kirby, Cat. Odonata, p. 31 ; Selys, Ann. 

 Mus. Genov. xix. (1879) p. 302. 

 Malacca. Philippines. 



*AGRIO]SrOPTERA MALACCENSIS SelyS. 



Agrionopte7-a malaccensis, Selys, Ann. Mus. Genov. xxvii. 

 p. 461 ; Kirby, Cat. Odonata, p. 31. 



(This genus differs from the preceding in the absence of the 

 supernumerary antenodal nervule of the front wings, and in 

 having several cross nervules in the submedian space, as well as 

 in the position of the base of the triangle of the hind wings, in 

 front of the arculus. The two genera closely resemble each other 

 in coloration.) 



*Agrionoptera nicobarica Brauer. 



Agrionojytera nicobarica, Kirby, Cat. Odonata, p. 31. 



Singapore, Nicobar Is. 



*Agrionoptera sexlineata Selys. 



Agrionojytera sexlineata, Kii'by, Cat. Odonata, p. 31. 



Recorded from Malacca. 



*Calothemis bivittata (Ramb.). 

 -Calpthemis bivittata, Kii-by, Cat. Odonata, p. 42. " ■ . 



