igig.] F. C. Fraser : Odonate larvae and exuviae. 461 



Mask typically Libelluline, very deeply cupped, lateral lobes 

 with interlocking teeth to the number of 16. These teeth pigment- 

 ed at the tips and turned sharply in so that the apposition of the 

 lobes is not so flush as in Hilar ga. Mid lobe moderately straight, 

 slightly crenate along the border and fringed with coarse hairs 

 (pi. xxxiv, fig. 3). 



Antennae long and filiform, 7 segments. 



Eyes small and shaped as horn-like processes which project 

 markedly out from the sides of the head. Two or three coarse 

 hairs posterior to the eyes and a largish, horn-like process at the 

 posterior, outer angle of the head. 



Trunk stout, abdomen tumid, markedly carinated, thecarina- 

 tion made up of a row of stout, backwardly directed spines, one 

 on each segment, to the number of 6 and each overlapping the 

 ensuing segment. The last four segments with stout spines on 

 the postero-lateral corners and segments 7, 8 and 9 with smaller, 

 but robust spines situated mesially on the borders. 



Legs very long and spidery, naked. 



Hab.— Similar situations to the last. 



Subfamily GOMPHINAE. 

 4. Macrogomphus annulatus, Selys. 

 (PI. xxxiii, fig. 3 ; pi. xxxiv, figs. 4, 4a.) 



Poona, 1.8. 19, 1515/H2. 



Length 49 mm. Length of hind femora 7' 5 mm. Length of 

 abdomen 39 mm. Mask typically Gomphine, very flat, oblong, the 

 basal half constricted, nientum square, lateral lobes kukri-shaped, 

 jaws armed with five robust teeth on the inner border and a long, 

 moveable hook on the outer. No setae. Mid lobe straight, not 

 projecting, minutely crenate along its border (pi. xxxiv, figs. 4 

 and 4a). 



Eyes globular, comparatively large. Head small. Antennae 

 short, club-shaped, 4 segments, coated with coarse, short hairs. 



Synthorax narrov/, wing-cases very narrow, triquetral, ab- 

 domen tapering towards the anal end, cylindrical, not carinated, 

 greatly elongated, especially the last two segments, the 9th 

 being furnished with a robust, backwardly directed spine on 

 the mid-dorsum. 



Legs very short and robust, adapted for digging, the femora 

 and tibiae strongly curved and the former furnished with a long 

 fringe of hairs on the extensor surface. 



Hab. — Burrows in mud, in running streams. The fringe of 

 hairs on the femora serve to collect flocculent debris which fur- 

 ther conceals the insect. 



The syphon-like end of the abdomen projects from the mud 

 and thus permits the easy inspiration of clear water for purposes 

 of respiration. 



