INDIAN DRAGONFLIES. 
615 
Cephalmchna, Laid., Rec. Ind. Mus., Vol. xxii, pp. 77-79, (1921). 
Eyes broadly contiguous ; Irons raised in front or projecting markedly ; occiput 
small, its hinder border slightly raised. 
Thorax short, robust. 
Abdomen long and slender in the male, stout and robust in the female. 
Slightly tumid at the base in the male and slightly constricted at the third 
segment, the 10th segment with a prominent middorsal carina. Oreillets of male 
prominent, the posterior border armed with 5 to 6 robust spines. 
Anal appendages nearly as long as the 9th and 10th segments, slender at the 
base, broadening inwardly after the first third, with a prominent mid-rib, 
pointed at the apex. 
Wings hyaline or enfumed ; stigma markedly short usually braced ; trigones- 
with 3 to 5 cells ; hypertrigones traversed three times ; are strongly angulated ; 
arcular space traversed usually 5 times ; Rs forked, 2 rows of cells between the 
fork; loop with 5 to 8 cells, rather small, and stunted ; a basal antenodal nervure 
of the first series always present and continuous with the first traversing 
nervure of the basal (arcular) space ; base of hindwing in the male obtusely 
angular ; rounded in the female ; anal triangle with 3 cells ; Rspl and Mspl 
running parallel with Rs and Miv respectively and enclosing 1 or rarely 
2 rows of cells especially near the margin of the wing ; antenodal and postnodal 
nervures numerous. 
liCgs long and rather slim ; hind femora with a row of closely-set, robust, short 
spines and 2 or 3 longer ones at the di.stal end ; tibial spines long and numerous : 
claw-hooks robust, situated nearer the base than apex, at which point the claws 
rapidly taper. 
Dentigerous plate of the female rounded and subdenticulate. 
Cephalsschna acutifrons, Martin, 1. c., Ris. Supp. Ent., No. 5, pp. 55-56, 
tab. 2, fig. 5, (1916); Laid. 1. c. (1921). 
Female. (Male unknown.) Length of abdomen 52 mm., of hindw'ing 47 mm. 
Face and frons olivaceous yellow, no markings above the frons which projects 
in front somewhat like the bows of a ship. 
Thorax dark brown with a humeral stripe of bright green on each side and two 
lateral stripes of yellow bordered with vivid green. 
Legs reddish yellow. 
Wings broad, especially the hind, hyaline but saffronated at the bases ; 
stigma small, reddish brown ; costa orange ; 25 antenodal nervures and 21 post- 
nodals in the forewing, 19 antenodal and 24 postnodal nervures in the hind. 
Abdomen broad and tumid at the base, the 2nd segment somewhat ovoid, 
the 3rd slightly constricted, dark brown marked with yellow' as follows : — the 
2nd segment with 2 small, linear, yellow spots at the centre and 2 others at the 
base, segments 3 to 9 have similar spots, the medial ones very small and linear, 
the basal larger and more semilunar in form. 
Anal appendages very small, linear, dark brown. 
Hah. Type female in the collection of Selys, labelled, India, is probably from 
Assam or Bengal. 
Cephalsschna masoni, Martin, Caliceschna, Cat. Coll. Selys, Aeschnines, fig. 
104, PI. Ill, fig. 12, p.lll ; Laid. Rec. Ind. Mus., Vol. xxii, pp. 77-78, 
(1921). 
Male. Length of abdomen 55 mm., of hindwing 41 mm. 
Face yellowish, a fringe of hairs round its circumference, flattened ; frons 
yellow' bordered finely w'ith black. 
Thorax blackish brown marked with a humeral band of green in front on each 
side and tw'o lateral bands of the same colour. 
Wings rather broad, hyaline ; stigma blackish brown, very short ; membrane 
short, white ; anal triangle of 5 cells ; forking of Rs begins well liefore the stigma ; 
