98 1LLIX0IS BIOLOGICAL MONOGRAPHS [268 



EXPLANATION OF PLATE 

 Labium 



Fig. 395. Stratiomyia apicula, caudal aspect of proboscis. 



Fig. 396. Stratiomyia apicula, mesal aspect. 



Fig- 397- My das clavatus, caudal aspect. 



Fig. 398. Mydas clavatus, cephalic aspect. 



Fig. 399. Bibioccphala elcgantula, cephalic aspect. 



Fig. 400. Sccnopinus fencstralis, mesal aspect. 



Fig. 401. Sccnopinus fencstralis, caudal aspect. 



Fig. 402. Psilocephala hacmorrhoidalis, caudal aspect. 



Fig. 403. Psilocephala haonorrhoidalis , mesal aspect. 



Fig. 404. Dcsinoinetopa latipes, caudal aspect. 



Fig. 405. Dcsmometopa latipes, cephalic aspect. 



Fig. 406. Lonchoptera lutea, caudal aspect. 



Fig. 407. Lonchoptera lutea, cephalic aspect. 



Fig. 408. Lonchoptera lutea, mesal aspect. 



Fig. 409. Sapromysa vulgaris, caudal aspect. 



Fig. 410. Sapromysa vulgaris, mesal aspect. 



Fig. 411. Chyromya concolor, caudal aspect. 



Fig. 412. Chyromya concolor, mesal aspect. 



Fig. 413. Euarcsta aequalis, caudal aspect. 



Fig. 414. Euarcsta aequalis, mesal aspect. 



Fig. 415. Platypeza velutina, mesal aspect. 



Fig. 416. Platypeza velutina, caudal aspect. 



Fig. 417. Conops brachyrhynchus, distal end, caudal aspect. 



Fig. 418. Conops brachyrhynchus, distal end, lateral aspect. 



Fig. 419. Conops brachyrhynchus, distal end, cephalic aspect. 



Fig. 420. Conops brachyrhynchus, caudal aspect. 



Fig. 421. Em pis clausa, caudal aspect. 



Fig. 422. Em pis clausa, portion of cephalic aspect. 



Fig. 423. Empis clausa, cephalic aspect. 



Fig. 424. Rhamphomyia glabra, caudal aspect. 



Fig. 425. Rhamphomyia glabra, mesal aspect. 



Fig. 425a. Eulonchus tristis, cephalic aspect. 



Fig. 425b. Eulonchus tristis, distal end, mesal aspect. 



Fig. 426. Exoprosopa fasciata, distal end, caudal aspect. 



Fig. 427. Exoprosopa fasciata, cephalic aspect. 



Fig. 428. Exoprosopa fasciata, distal end, mesal aspect. 



Fig. 429. Exoprosopa fasciata, caudal aspect. 



