110 ILLINOIS BIOLOGICAL MONOGRAPHS [280 



EXPLANATION OF PLATE 

 Epipharynx and Hypopharynx and Associated Parts 



Fig. 551. Calobata univitta, caudal aspect. 



Fig. 552. Calobata univitta, lateral aspect. 



Fig. 553. Sapromyza vulgaris, lateral aspect. 



Fig. 554. Sapromyza vulgaris, caudal aspect. 



Fig. 555. Chloropisca glabra, caudal aspect. 



Fig. 556. Chloropisca glabra, lateral aspect. 



Fig. 557. Chrysomyza demandata, caudal aspect. 



Fig. 558- Chrysomyza demandata, lateral aspect. 



Fig. 559. Coelopa vanduzeii, caudal aspect. 



Fig. 560. Coelopa vanduzeii, lateral aspect. 



Fig. 561. Pipunculus cingulatus, caudal aspect. 



Fig. 562. Pipunculus cingulatus, lateral aspect. 



Fig. 563. Drosophila ampelophila, caudal aspect. 



Fig. 564. Drosophila ampelophila, lateral aspect. 



Fig. 565- Borborus cquinus, lateral aspect. 



Fig. 566. Borborus equinus, caudal aspect. 



Fig. 567. Borborus equinus, hypopharynx united with labium, caudal aspect 



Fig. 568. Chyromya concolor, caudal aspect. 



Fig. 569. Chyromya concolor, lateral aspect. 



Fig. 570. Loxocera pectoralis, caudal aspect. 



Fig. 571. Loxocera pectoralis, lateral aspect. 



Fig. 572. Euaresta aequalis, caudal aspect. 



Fig. 573. Euaresta aequalis, lateral aspect. 



Fig. 574. Ochthera mantis, lateral aspect. 



Fig. 575. Ochthera mantis, caudal aspect of the labrum. 



Fig. 576. Ochthera mantis, caudal aspect of the epipharynx. 



Fig. 577- Ochthera mantis, caudal aspect. 



Fig. 578. Dcsmometopa Talipes, lateral aspect. 



Fig. 579. Dcsmometopa latipes, caudal aspect. 



