104 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 68 



Fig. 16. Fore tarsus of male, Phrosinella aldrichi, new species, viewed from 

 the inside. 



17. Fore tarsus of female, Phrosinella fulvicornis Coquillett, viewed from 



above. 



18. Fore tarsus of male, S phenometopa nebulosa Coquillett, viewed from 



the side 



19. Fore tarsus of male, Metopia campestris Fall6n, viewed from above. 



Plate 4 



a fif = accessory gland; a p = accessory pouch of uterus; o = ovary; o d = oviduct; 

 s = spermatheca; w = uterus 



Fig. 20. Reproductive organs of female, Senotainia trilineata Van der Wulp. 



21. Puparium of Senotainia vigilans Allen, Dorsal aspect. 



22. Reproductive organs of female, Senotainia vigilans. 



23. Head of Senotainia vigilans. 



24. Wing of Senotainia vigilans. 



25. Reproductive organs of female, Senotainia litoralis Allen. 



26. Egg (from uterus) of Opsidia gonioides Coquillett. 



Plate 5 



Fig. 27. Posterior end of puparium of Senotainia vigilans Allen. d = spiracu- 

 lar depression; s ? = slits in posterior spiracle; s< = posterior spiracle 

 or stigma 



28. Second instar larva of Senotainia trilineata Van der Wulp. Lateral 



aspect of anterior end. I, II, and 111 = thoracic segments; a s — 

 anterior spiracle. 



29. Buccopharyngeal armature of the first instar (uterine) larva of Phro- 



sinella fulvicornis Coquillett. b p=basal piece; I /i = lateral hooks; 

 rn /i = median hook; p-// = H-piece. 



30. Buccopharyngeal armature of the first instar (uterine) larva of Seno- 



tainia rubriventris Macquart. For explanation of letters see fig. 29. 



31. Buccopharyngeal armature of the first instar (uterine) larva of Seno- 



tainia trilineata Van der Wulp. For explanation of letters see fig. 

 29. 



32. Buccopharyngeal armature of the first instar (uterine) larva of Seno- 



tainia litoralis Allen. For explanation of letters see fig. 29. 



33. Buccopharyngeal apparatus of the first instar (uterine) larva of Seno- 



tainia vigilans. For explanation of letters sec fig. 29. 



34. Buccopharyngeal armature of the second instar larva of Senotainia 



trilineata showing the lateral hooks of the succeeding instar in pro- 

 cess of formation, a p = accessory process of the basal piece; 

 b p = basal piece; i p = intermediate or H-piece; I /i = lateral hooks; 

 I h 77/ = lateral hooks of the third instar partly formed. 



35. Diagramatic outline of spiracular depression at posterior end of pupa- 



rium of Phrosinella fulvicornis. For explanation of letters see fig. 27. 



