456 DK. F. LEUTHNER ON THE ODONTOLABINI. 



the elytra always yellow beneath ; scutellum triangular, generally bisected by a median 

 line ; front tibiae spineless, or with from one to three spines above the terminal fork. 



Ilandihles. 



1. Forma telodonta. — Mandibles longer than the head and prothorax together, very 

 long, rounded, and slender, the tip armed with five small irregular teeth, which are 

 forked into two groups, as in the preceding species ; in the middle is a straight rounded 

 tooth, and there are two small teeth at the base, the first of which is sometimes forked. 

 Head with enormously developed and raised frontal margin. Seven specimens (one 

 Brit. Mus., six from Rev. S. J. Pettigrew's coll.). 0. hurmeideri, type form (fig. 5). 



2. Forma mesodonta. — Mandibles as long as or rather longer than the head, broader 

 and more compressed than in no. 1, with a strongly developed central tooth, that on 

 the right side most developed. The terminal series of five or six small teeth shows a 

 tendency to bifurcate on the right side, but not on the left side, where from six to 

 eight small equal-sized teeth succeed each other regularly. Base with two or three 

 obtuse teeth. On the left side the central tooth is nearer the base, and may almost 

 coalesce with the two basal teeth (fig. G). Two specimens (exactly alike) from 

 Pettigrew's collection. 



3. Forma p-iodonta. — Mandibles as long as the head, and very slightly curved, flat- 

 tened, the right side rather more strongly developed and broader than the left, with 

 from seven to eight small irregular teeth. Head flattened, canthus rather broader than 

 in the preceding forms. 



N.B. The prothorax is rather narrower (compare mi asurements). Lower border of 

 the prothorax not wrinkled, but finely punctured, as in 0. delesserti. 



One specimen, British Museum (fig. 7) with male pattern of elytra, fig. 8 smallest 

 male, from Parry's collection, with female markings. 



Female. Like the male, it attains a truly gigantic size. It more resembles 0. cuvera 

 in appearance than 0. delesserti, which occurs in the same locality. The canthus is 

 very strongly developed, and much broader than in either 0. cuvera or 0. delesserti ; 

 prosterual process as in male, very hmg and rounded. The pattern of the elytra is very 

 characteristic ; the black space on the dark sulphur-yellow ground-colour is no longer 

 a straight triangle, but tongue-like, broadest at the base, and narrowed towards the 

 middle, and its outer edge runs for a short distance parallel to the suture, and grows 

 suddenly narrower at the tip ; the rim of the elytra is yellow beneath in all the speci- 

 mens which I have examined; scutellum triangular, with a central raised line; front 

 tibise with four spines above the terminal fork. 



Habitat. Travancore and IMalabar. 



