Genus and Species of Mantodea. 439 



Total length 38 millim. ; length of pronotum 8, breadth at 

 dilatation 4'75 ; length of abdomen without seg. med. 17, 

 breadth 8 ; length of tegmina 30, breadth 105, of marginal 

 field 3; length of fore coxa 9 5, femar 11*3, of intermediate 

 femur 7, tibia 5, of posterior femur 8, tibia 7. 



<$ . Unknown. 



llab. Singapore. 



EXPLANATION OF PLATE XVII. A. 



Parymenopus Davisoni. a, head and pronotum from above; b, head from 

 in front ; c, intermediate leg of the left side from above ; all 

 X 5. Camera lueida reductions of drawings made under a 

 Ross's 4-inch bv the aid of a camera lueida. 



L1V. — Description of Triaenocorypha Dohertii, the type of a 

 new Genus and Species of Mantodea. By J. Wood-Mason, 

 Superintendent of the Indian Museum, and Professor of 

 Comparative Anatomy in the Medical College of Bengal, 

 Calcutta. 



[Plate XVII. B.] 



Triaenocorypha, gen. nov. 



Head armed with three slender conical horns, two paired, 

 arising posteriorly from the submedian lobes, and one unpaired, 

 anteriorly from the middle of the anterior end of the median 

 lobe of the vertex ; facial shield transverse. Pronotum armed 

 on each of its two lobes with a pair of spines similar to, but 

 taller than, those which form the cephalic horns ; its supra- 

 coxal dilatation prominently triangular. Postero-lateral 

 angles and sides of the seven basal abdominal terga produced 

 downwards and backwards into long, externally concave, and 

 slightly curved spines, the longest of which is about two 

 thirds, and the shortest about one third, as long as the fore 

 femur. Fore femora lamellar, oval, about twice as long as 

 broad, armed below on the outer edge with 4 spines, on the 

 inner with 5, exclusive in each case of the spine of the apical 

 lobe, and on the disk with 2 only, the first of which, 

 answering to the basal one of the series in Oxypilus and its 

 allies, is the larger, and the second, answering to the apical 

 one of the series in the same genus, is much the smaller, the 

 intermediate spines being absent ; tibiae armed below on the 

 inner edge with 6 spines, and on the outer with 1 only — that 



