194 Records of the Indian Museum. [Voi,. XVI, 



directly from behind show a deep cleft running from above down- 

 wards near the inner margin. The inner tooth of the upper append- 

 age is not visible when the appendage is viewed from the side 

 and is not shown in my figure of the anal appendages of the species 

 {loc. cit., p. 24, fig. 2). 



Pseudagrion hypermelas, Selys. 



Pseiidagyio>i Iiyfieniielas, Kirby, Cat. Odonafa, p. 153 (1890); Morton, 

 Trans. Ent. Soc. Land., 1907, p. 307, pi. xxiv, fig. 9 ; see also 

 Rec. Ind. Mus., XII, p. 21 (1916). 



The young males have segments 8-10 of the abdomen pale 

 gray-blue not black, in the case of specimens from Kierpur, whence 

 I have examined three males. Segment 8 has a black basal patch 

 dorsally, about one-quarter the length of the segment. The 

 pale colour is apparentl^^ replaced by black in mature specimens. 

 The anal appendages are identical with those figured by Morton for 

 his specimens. 



Archibasis ceylonica, Kirby. 



Archibasis ceylonica, Kirby, P.Z.S. 1891, pp. 205,206, pi. xx, fig. 4. 



In reading Kirby's account of the type specimen I felt some 

 doubt as to its generic position. Accordingly I wrote to Mr. H. 

 Campion of the Imperial Bureau of Entomology, sending him 

 specimens of Pseudagrion rtibriceps, Selys, with a request for com- 

 parison and information. I am indebted to him for the following 

 remarks : — 



" The type (female) has two forwardly directed spines on the 

 prothorax, I cannot see whether the upper anal appendages of the 

 male, caked with mud, are simple or bifid I do not know the 

 genotype of Pseudagrion or of Archibasis, but see no particular 

 objection, on venational grounds, to regard Kirby's specimen as a 

 Pseudagrion. I have compared your specimens from Nagpur with 

 the cf and 9 from Ceylon which Kirby called Archibasis ceylonica. 

 Upon structural grounds I am unable to separate the two series at 

 all, and the colour differences which I have noted are probably not 

 of more than sub-specific value." 



It is reasonable to conclude that Archibasis ceylonica, Kirb}^, 

 is really a Pseudagrion and that it is at any rate allied to P. 

 rubriceps, Selys. 



Archibasis oscillans (Selys) ? 



Archibasis oscillaiis, Laidlaw, Rec. Ind. Miis., VIII, pp. 343-344, pi. xvi, 

 fig- 3 Ci9'4)- 



I have re-examined an imperfect male of the above series and 

 am still doubtful of the identification, though the species may 

 be an Archibasis. In many respects it approximates to Pseudag- 

 rion ; from a typical member of that genus it differs as follows : — 



Venation. — The wings show rather more petiolation. Ab 

 rises distinctly beyond Ac, whilst Ac lies nearer to An,^ than to An,. 

 The pterostigma is short and more rectangular than in Pseudagrion. 

 Presence or absence of post-ocular spots is doubtful. 



