181] HEAD OF DIPTERA— PETERSON 11 



370, 520, and 525), Chrysopila proxima, Chiysopila thoracica, 



Chrvsopila quadrata, and Chrysopila velutina. 

 Cyrtidae.— Oncodes costatus (Fig. 53, 105, 109, 220, 486, and 487), 



Eulonchus tristis (Fig. 284a, 364a, 425a, 425b, and 543), and 



Pterodontia flavipes. 

 Bombyliidae.— Exoprosopa fasciata (Fig. 29, 98, 162, 216, 285, 361- 



426-429, 549, and 550), Systoeehus vulgaris, Lepidophora sp., 



and Bombylins major (Fig. 482). 

 Therevidae. — Psilocepliala liaemorrhoidalis (Fig. 33, 36, 100, 173, 



281, 324, 402, 403, 533, and 534). 



Seenopinidae. — Scenopinus fenestralis (Fig. 41, 42, 107, 149, 219, 



282, 325, 400, 401, 537, and 538). 



Mydaidae.— Mydas clavatus (Fig. 30, 99, 146, 212, 271, 319, 397, 



398, 535, and 536). 

 Asilidae.— Promachus vertebra tus (Fig. 22, 84, 147, 148, 217, 276, 



322, 376-379, and 517-519), Asilus notatus, and Derorayia um- 



brina. 

 Dolichopodidae.— Doliehopus bifractns (Fig. 43, 112, 168, 226, 284, 



432-434, 524, and 528), Doliehopus sp. (Fig. 108), Psilopodi- 



nus sipho, and Sympycnus lineatus. 

 Empididae.— *Empis clausa (Fig. 26, 40, 97, 164, 215, 274, 352, 



421-423, 547, and 548), Rhamphomyia glabra (Fig. 424 and 



425), and Euhybus sp. 

 Lonehopteridae.— Lonchoptera lutea (Fig. 37, 102, 177, 223, 280, 



320, 406-408, 539, and 541). 

 Phoridae.— Aphiochaeta agarici (Fig. 31, 111, 174, 224, 278, 335, 



393, 394, 540, and 544), Metopina sp., and Dohrniphora con- 



cinna. 

 Cyclorrhapha-Atlierieera. 



Platypezidae.— Platypeza velutina (Fig. 32, 110, 165, 222, 272, 326, 



415, 416, 542, and 542a). 

 Pipunculidae.— Pipunculus cingulatus (Fig. 38, 39, 106, 151, 243, 



279, 327, 435, 436, 561, and 562). 

 Syrphidae.— Eristalis tenax (Fig. 23-25, 113, 167, 232, 286, 328, 



441-443, 587, and 588), Syritta pipiens, and *Allograpta ob- 



liqua. 

 Conopidae. — Conops brachyrhynehus (Fig. 67, 117, 186, 221, 305, 



356, 417-420, 591, and 592), Stylogaster biannulata (Fig. 359), 



and Physocephala tibialis. 

 Cyclorrhapha-Calyptratae. 



Oestridae.— Gastrophilus equi (Fig. 54, 138, 239, and 490-492). 

 Taehinidae.— Archytas analis (Fig. 68, 124, 197, 247, 309, 353, 468, 



469, 604, and 605), Siphona geniculata (Fig. 355 and 458), 



