TEGEOCRANUS DENTATUS. 339 



reticulated. Opistliophragmatic processes very fine. 

 Sternum only slightly developed. 



Legs long for the genus ; the femora of the first 

 pair have slender peduncles to suit the deep clefts in 

 which they are inserted ; the other femora pyriform ; 

 genuals of the two front pairs rather longer than usual ; 

 tibijB slender and clavate. The first pair of legs only 

 have the tactile hair ; tarsi clothed with fine hairs, and 

 there are a few fine, curved hairs, arranged in a whorl, 

 near the distal end of each of the other joints of each 

 leg. 



Abdomen hroacl and rounded, scarcely if at all longer 

 than its width; it is truncated where it joins the 

 cephalothorax, and is there broader than the latter, 

 from which it is lolainly divided. Notogaster distinctly 

 divided into two regions, viz. a central, and a border, 

 which latter is absent from the progaster ; the border 

 is really double, but the two are not so distinct as in 

 T. latus. The central portion is arched, and almost 

 entirely covered by large, very irregular reticulations, 

 with deep pits between them ; the surface of the ridges 

 is granular, and the bottom of the pits finely dotted. 

 Immediately surrounding the central portion is a broad 

 granular band, sloping downward, indistinctly divided 

 into an inner and an outer band. It is simply granular 

 as far as the third pair of legs, after which it begins to 

 be cut into irregular transverse ridges forming strongly 

 marked projecting points round the lateral and hind 

 margins. There are about a dozen very fine, short, 

 white hairs round the inner edge of the border. 

 Genital and anal plates pentagonal, near together; 

 whole ventral surface rouo^h. 



Larva and Nyrnph. 



These are so like the corresponding stages of J'; 

 latus that I do not propose to redescribe them; the 

 only difference being that the great, curved, serrated 



