98 ILLIXOIS BIOLOGICAL MOXOGRAPHS [26& 



EXPLANATION OF PLATE 

 Labium 



Fig. 395- Stratioinyia apicula, caudal aspect of proboscis. 



Fig. 396. Stratioinyia apicula, mesal aspect. 



Fig. 397- Mydas clavatus, caudal aspect 



Fig. 398. Mydas clavatus, cephalic aspect. 



Fig. 399. Bibiocephala elegantula, cephalic aspect. 



Fig. 400. Scenopinus fenestralis, mesal aspect. 



Fig. 401. Scenopinus fenestralis, caudal aspect. 



Fig. 402. Psilocephala haeniorrhoidalis, caudal aspect. 



Fig. 403. Psilocephala haeinorrhoidalis, mesal aspect. 



Fig. 404. Desmometopa latipcs, caudal aspect. 



Fig. 405. Desmometopa 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. Chyroniya concolor, caudal aspect. 



Fig. 412. Chyromya concolor, mesal aspect. 



Fig. 413. Euaresta aequalis, caudal aspect 



Fig. 414. Euaresta aequalis, mesal aspect. 



Fig. 415. Platypesa velutina, mesal aspect. 



Fig. 416. Platypesa velutina, caudal aspe6t. 



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. Einpis clausa, caudal aspect 



Fig. 422. Empis clausa, portion of cephalic aspect 



Fig. 423. Empis clausa, cephalic aspect. 



Fig. 424. Rhamphomyia glabra, caudal aspect 



Fig. 425. Rhamphomyia glabra, mesal aspect. 



Fig. 42Sa. Eulonchus tristis, cephalic aspect. 



Fig, 42Sb. Eulonchus <rij/if/ 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. 



