3/6. Records of the Indian Museum. [Vol. XXIV. 



The males are undoubtedly conspecific with the female. The 

 latter is very mature and in bad condition. The head is missing 



from one of the males, the 

 occiput of the other differs from 

 that of the type male described 

 by de Selys in not possessing a 

 conical tubercle, and to some 

 extent in details of colouring. 

 The different appearance of the 

 occiput may be an individual 

 peculiarity, the colouring pro- 

 bably owes its distinctions to 

 Fig. i.— Colour-pattern of syn thorax of age and state of preservation. 

 Macrogomphus robustus Selys. At any rate I propose to list 



the males under the Selysian 

 species for the present. 



Male. Head. Upper lip black save for a small yellow mark 

 on either side at the base. Ante- and post-clypeus largely brown- 

 ish-yellow margined with black, vertical parts of frons black, its 

 horizontal part brownish-yellow on the synthorax, the jtixta-hu- 

 meral stripes are quite obsolete, and the whole of the metepis- 

 ternite is black. The abdomen has segments 3-8 ringed with yellow, 

 the yellow ring on the seventh segment covering the basal half of 

 the segment, that on the other segments about the basal fifth of 

 each. Segments 9 and 10 entirely black. Upper anal appendages 

 yellowish-white darkening apically, the outer branch of each being 

 the stouter, jointed at its apex ; the inner branch is slender rather 

 knobbed terminally and not quite so long. 



Length of abdomen of 0^51 + 2 mm., of hinder-wing 405 

 mm. ; length of abdomen of 9 47 mm., of hinder- wing 40 mm. 



Macrogomphus annulatus Selys. 



3d? S, 3? 9. Poona. F. C. Fraser. 



Fairly similar to M. robustus. It differs slightly in size. In 

 colour its markings seem to be of a paler yellow than those of M. 

 robustus in which (in dried specimens) thej 7 are distinctly brown. 

 M. annulatus has the upper lip largely lemon-yellow, its base 

 and a median longitudinal line black. The vertex has a small 

 yellow spot immediately behind the ocelli. 



The synthorax has a minute 3*ellow spot, the last vestige of 

 the humeral band, just in front of the alar sinuses to the outer 

 side of the dorsal marks. This is present in all the specimens I 

 have seen. The ninth segment of the abdomen has a small basal 

 lateral spot of yellow. The metepisternite is entirely black. 

 For an account of the larva of this species, and for an interesting 

 note on its habits see Fraser. 



Length of abdomen of d" 494-1*8 mm., of hinder-wing 38 

 mm.; length of abdomen of 9 51 mm., of hinder- wing 39 mm. 



