1921.J F. F. Laidlaw : IndicDi Dra^onjiies. 79 



aeschiiii. Species (jrii;inally described by Tillyard as Calineschna 

 cnnspcrsa, Proc. Linn. Soc. jV.5.lF. ,XXXI, pp. 727-729, 1906. 

 Lasth', Ris following MacLachlan refers Ausiroaeschna milnei 

 (Selys), from Japan and Formosa to tlie genus Planaeschna, 

 Sitpplementa Entomol. No. V, 1916, pp. 37-58, taf. 2, fig. 6, 

 text-fig. 39), whilst MacLachlan (Ann. Mag. Nat. Hist. (6), 

 XVII, 1895, pp. 409-425) defines the genus Planaeschna, 

 and refers to an undescribed genus probably identical with 

 Martin's Periaeschna. He comments on the imoortance of 

 the dentigerous plate of the female as a generic character, 

 incidentalh- remarking on the distinctness of Cephalaeschna 

 sikkima, Karsch, as demonstrated l)y this character, from the 

 type of the genus, and from Ca/ijcsrinia. Tillvard, Joiirn. 

 Linn. Soc, ZooL. XXXI II. 



I Caliaeschna microstigma, Schneider.] 



Ciifiaeschiiii tnirroitigmu. KIrbw C.it. (hii'iiafa, p. 9,^. 



.\Ianin, Ci:f. Coll. Setvs .-tesrhiiiiicie. pp. 

 108-109. f'a'^- '"" -"II- 



2 0^ cf I 2 . Shiraz, Persia, May '71. 



Specimens named and labelled bj' de Selys. 



This species has not been recorded from the Indian Empire 

 and probably does not occur within its boundaries. 



As stated above it is the only sjiecies included by de Selys in 

 his genus Caliaeschna. 



The ej'es of this species are relatively smaller than in otiier 

 members of the group seen by me, with more regularly rounded 

 margins. The inter- orbital suture is shorter than in otlier 

 species, but as this is not a plane line it is difficult to estimate 

 accurately. Perhaps the most satisfactory way of describing it is 

 to sa}^ that the interorbital suture of Caliaeschna niicrosttgma is 

 shorter than a line taken from its anterior end to the anterior 

 apical point of the frons, whilst in Cephalaeschna ? sp. as well as in 

 Periaeschna and in Ausiroaeschna inter sedens the interorbital suture 

 is definitely longer than such a line. Further, in the three latter 

 genera the anterior margins of the eyes meet the suture almo.st at 

 a right angle, whilst in Caliaeschna the angle is about 115°. 



The pterostigma of Caliaeschna microstignia is unbraced. The 

 strong antenodal cross-nerves are the first and the fifth, the latter 

 lies at, or a little distal to the level of the arculus. The discoidal 

 triangles are relatively small. 



The width of the frons is decidedly less than one-half of the 

 total width of the head. 



Lastly, the colouring of this species is ' heHochromatic,' that 

 of the other species of the series ' hylochromatic' 



Austroacschna intersedens, Martin. 



Anstfoaeschna intersedens, Martin, Cat. Coll. Selys Aeschiiinne, p. 101, 

 pi iv, fig. 14 (see also Tillyard, loc. cit.): 



