181] HEAD OF DIPTERA— PETERSON It 



370, 520, and 525), Chrysopila 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 haemorrhoidalis (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), Ehamphomyia 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. 

 Cyclorrhapha-Athericera. 



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



415, 416, 542, and 542a). 

 Pipunculidae. — Pipuneulus 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 Physoeephala tibialis. 

 Cyclorrhapha-Calyptratae. 



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

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



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



