PACHYBHINA. 



341 



4. Pleurpe with a shining black spot as in 



P. pleurinotata rf 



Pleurae without any black spot 



5. Wings distinctly submarmorate ; the outer 



brown stripe on the lateral margin of the 

 thorax rather conspicuously marked oft' 

 from the yellow sides, below which colour 

 lies a lateral brown pleural stripe ; the 

 2nd posterior cell subpetiolate ; oblite- 



rative streak present 



Wings never marmorate ; the side colours 

 (if any) ne\er so sharply denned; the 

 2nd posterior cell practically never petio- 

 late ; the obliterative streak absent .... 



6. Thorax wholly bright orange-yellow, the 



usual three dorsal stripes very faintly 



darker 



Thorax always with the usual three dorsal 

 black or dark brown stripes very distinct. 



7. Outer thoracic stripes distinctly turned out- 



wards and downwards at" their tips; 

 femora generally more or less blackish on 



apical half 



Outer thoracic stripe abruptly terminated, 

 clear-cut, but not curved outwards or 

 downwards; femora generally yellowish 

 with a tolerably distinct apical narrow 

 blackish band 



8. Frons unmarked, or with a small vertical 



dark streak 



An inverted Y-shaped black mark on frons 



9. Bright lemon-yellow species (at least the 



thorax) t 



Brownish yellow or ferruginous species t . . 

 10. Thoracic stripes clearly denned at their 



anterior ends 



Thoracic stripes fading away gradually at 



their anterior ends . 



pleurinotata, sp. n., . 

 5. [p. 3 1 3. 



demarcata, sp. n.,* 



[p. 344. 



concoloritliorax. sp. n.,f 

 [p. 346. 



t . 



consimilis, Brun.,p. 346. 

 gamma, sp. n., p. 347. 



javensii*, Dol.. p. 348. 

 10. 



doraopunctata, Brun., 

 [p. 350. 



bombayensis, Macq., 



[p. 351. 



244. Pachyrhina serricornis, sp. nov. 



J . Head : ground-colour varying from bright lemon-yellow to 

 rather deep orange-yellow ; vertex and back of head often with a 

 brown or blackish streak ; frons somewhat prominent ; whole 

 upper part of head with very short black hairs ; eyes black. 

 Proboscis yellowish or orange-yellow, often with a dark brown or 



* A little uncertainty attaches to the presence of this species here, as the 

 submarmorate wings and the obliterative streak are much more characteristic 

 of Tipula. As, however, the 2nd posterior cell is sessile (petiolate in one 

 specimen only), it should fall technically into Pachyrhina. It is the only 

 species about the generic position of which there is any doubt. 



t This is not a very good distinction, but no other seems practicable. In 

 tbe case of doubtful or intermediate specimens, both sections must be searched. 



z2 



