PHYSOCEPHALA. 



355 



longer in intermedius than in any Indian species known to me. 

 The abrupt termination of the dark band on the wing, however, 

 is more characteristic of P/ii/socephala than of Conops. 



Genus PHYSOCEPHALA, Sch. 

 Physocephala, Schiner, Wien. Ent. Monatscbr. v, p. 137 (1861) 

 Genotype, Conops rvfipes, i"'abr. ; by original designation. 



Though forming a natural group by a combination of char- 

 acters, Physocephila is undoubtedly very closely akin to Conops, 

 and a certain nnmber of species, even when valued by all the 

 characters combined, may be said to be intermediate. Probably 



Fig. 70. — Wings of Physocephala. 



a, P. nnnida, Bnin., J. 



b, P. aurantiaca, sp. nov., $ . 



c, P. iiursei, sp. nov., cf . 



d, P. orgcntifera, sp. nor., $. 



e, P. diffui'a, sp. nov., vnr. 



f, P. diffusa, normal form. 



g, P. tcnella, Big., var. 



li, P. tenclta, normal form. 



the best single means of differentiation lies in the strui'ture of 

 the femora, whicli in Conops are usually ol unitorm tliickness 

 throu"-hout, or at most thickened gradually and rt'gularly, but 

 which in I hysocephala are (particularly tlie hind pair) thickened 



2a2 



