3i6 



The Two-winged Flies 



Fig. 433. Fig. 434. 



Fig. 433. — Net-winged midge, Bihiocephala elegaiitnliis, female. (Natural length of 

 body, I inch.) 



Fig. 434. — Mouth-parts of female nct-ninged midge, Bibioccphala doatiei. I.ep., labrum- 

 epipharynx; md., mandible; m.v., ma.xilla; mxL, ma.xillary lobe; mxp., ma.xillary 

 palpus; li., labium; pg., paraglossa; hyp., hypopharynx. (Much enlarged.) 



Fig. 435. — Heads of female (at left) and of male (at right). of net-winged midge, Bihio- 

 cephala comslocki, showing division of eyes into two parts, the upper part with fewer 

 and larger facets than the lower part. (Much enlarged.) 



