new and little-knoion Ti[)uli(l£e. Ill 



Nephrotoma delta (Walker). 



Tipula delta, Walker, lus. Saund. i. p. 445 (1856). 



I'achyrhina dorsopunctafa, Bruuetti, Rec. lud. Miis. vi. p. 265 (1911). 



Formosa : Chyoshu, 21. xi. 1916 {T. Shiraki), 1 ? . 

 Agrees well with Walker's type aud with Brunetti's 

 description. 



Ctenacroscelis, Enderlein. 



The species dealt with below all belong to the brobdig- 

 nagius group, the members of which are distinguished by 

 their great size, brownish wings without conspicuous mark- 

 ings, vein Cu more or less dark-bordered, especially about 

 the fork, and a narrow dark stripe on the ochreous pleurse 

 extending from the neck to below the wing-base ; the 

 prsescutum has three almost confluent blackish-grey stripes, 

 the middle one more or less distinctly divided by a dark 

 line ; the antennae, except for the apical part of the flagellum, 

 are light ochreous, and have the verticillate hairs very short, 

 sometimes barely perceptible. 



The umbrinus group shows a very similar coloration, but 

 the insects are much smaller, the first joint of the antennte 

 is dark, and the preescutum generally has fovir dark stripes, 

 the middle pair separated by a narrow pale line. 



The prapotens group {prcepotens, Wied., monochrous, 

 Wied., rex, Alex., etc.) differs from the brobdignagius group 

 in the absence of the dark pleural stripe. There is a female 

 specimen of C. prapotens (Wied.) in the British Museum 

 from Java, which is amply distinct from all the species of 

 the brobdignagius group : the preescutum has four distinct 

 dark stripes ; the wings, apart from the yellowish stigma, 

 are uniformly greyish, without a trace of darkening on vein 

 Cu. Doubtless a number of species have been confused 

 under the name prapotens, and its range is not likely to be 

 so extensive as has been supposed. The specimen recorded 

 by Walker from Nepal is not this species, but apparently 

 C. dives (Brun.) or a very closely allied species; another 

 example in the British Museum labelled prcepotens is in 

 reality C. fulvolateralis (Brun.) (? = sikkimensis, End.). 

 Both these species belong to the brobdignagius group. 



Ctenacroscelis clavipes, sp. n. 



Head rather deep ochreous above, dark grey behind the 

 eyes ; pale ochreous beneath ; sides of rostrum dark brown ; 



