181] HEAD OF DIPTERA— PETERSON U 



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



Chrysopila 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), Systoechus vulgaris, Lepidophora sp., 



and Bombylius major (Fig. 482). 

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



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



Scenopinidae. — 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 vertebratus (Fig. 22, 84, 147, 148, 217, 276, 



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



brina. 

 Dolichopodidae.— Dolichopus bifractus (Fig. 43, 112, 168, 226, 284, 



432-434, 524, and 528), Dolichopus 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. 

 Lonchopteridae.— 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. 

 Cyelorrhapha-Athericera. 



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 brachyrhynchus (Fig. 67, 117, 186, 221, 305, 



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



and Physocephala tibialis. 

 Cyelorrhapha-Calyptratae. 



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

 Tachinidae.— Arehytas analis (Fig. 68, 124, 197, 247, 309, 353, 468, 



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



