X LIST OF ILLUSTRATIONS. 



PLATES. Facing 



page. 



39. Wing photographs of Leptobasis and Metaleptobasis 638 



40. Wing photographs of Palaemnema 638 



41. Wing photogaphs of Protoneura 638 



42. Wing photographs of Protoneura 638 



43. Thoracic color patterns of Protoneura 638 



44. Male appendages of Protoneura 638 



45. Outside views of Haliotis pourtalesii and H. dalli 662 



46. Inside views of Haliotis pourtalesii and H. doJU 662 



TEXT FIGURES. 



Page. 



Ceratodrilus thysanosomus. Dental plates, a, ventral plate; b, dorsal plate. . 191 



Ceratodrilus thysanosomus. Ventral view 192 



Ceratodrilus thysanosomus. Dorsal view 192 



Diagram of fifth antennal segment, female, Rubsaamenia multinoda 199 



Cephalic horns of pupa of Ctenodactylomyia watsoni 200 



Middle claw of male of Ctenodactylomyia watsoni 200 



Dorsal view of the apex of the female abdomen of Ctenodactylomyia watsoni . . . 201 



Outline of fifth antennal segment, female, of Xenasphondylia albipes 202 



Outline of the tip of the ovipositor of Proasphondylia braziliensis 204 



Fifth antennal segment, female, of Oxasphondylia reticulata 205 



Outline of thirteenth and fourteenth antennal segments of female of Oxas- 

 phondylia reticulata 205 



Outline of the biarticulate palpus of Oxasphondylia reticulata 205 



Sixth antennal segment of male of Eocincticornia australasiae, showing the 



numerous anastomosing circumfili 207 



Outline of male genitalia of Eocincticornia australasiae 207 



Side view of the apex of the female abdomen of Eocincticornia australasiae .... 208 



Fifth antennal segment of the female of Eohormomyia howardi 209 



Dorsal view of the apex of the female abdomen of Eohormomyia howardi 209 



Side view of the apex of the abdomen of Scopodiplosis speciosa, female 210 



Euphronides depressa. Dorsal unpaired papilla from various individuals, 



showing variation in degree of bifurcation 245 



Lateral view of seventh (third abdominal) segment of Dimorphopteryx castaneae. 498 



Anterior aspect of head of Dimorphopteryx castaneae 499 



Anterior aspect of head of Dimorphopteryx autumnalis 499 



Dorsal view of armature of apical segment of Dimorphopteryx autumnalis 500 



Lower molars of Bison sylvesteris 522 



Upper premolars (a) and upper molars (&) of Equus hatcheri 532 



Lower premolars (a) and lower molars (6) of Equus hatcheri 533 



Upper premolars and molars. Lower last premolar and molars 540 



Hexaplasta marlatti. Female antenna 581 



Hexaplasta marlatti. Male antenna 581 



Hexaplasta fungicola. Antenna of female 581 



Hexaplasta fungicola. Antenna of male 581 



Hexaplasta websteri. Female antenna 582 



Hexaplasta zigzag. Antenna of female 582 



Geniocerus hagenowi. Female antenna 584 



Geniocerus hagenowi. Detail of female antenna to show ring joints 584 



Geniocerus chrysopae. Female antenna 585 



Geniocerus juniperi. Female antenna 585 



Geniocerus marcovitchi. Female antenna 586 



Lateral, dorsal, and oblique views of the male appendages of Telagrion raineyi. . 614 



