22 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. IO7 



Plate 3 



Fig. 18. Left half of the prothorax, mesal view. Some of the muscles which 

 appear in figure 17 have been removed. 



19. Same, some muscles removed. 



20. Same, some muscles removed. 



21. Articulation of the right fore wing with the mesothorax, dorsal view. 



Only the right half of the mesonotum and the basal part of the 

 wing appear on the figure. (See explanation of abbreviations.) 



22. Right half of the mesothorax, dorsal view. Muscles seen as they 



appear when the mesonotum is removed. 



23. Same, some muscles removed. 



24. Same, showing the coxa in the lower part of the figure. Some muscles 



removed. 



Plate 4 



Fig. 25. Right side of the mesothorax and right coxa, dorsal view. The posterior 

 wall of the coxa has been removed to show the muscles inside. 



26. Same, some muscles removed. 



27. Same, some muscles removed. 



28. Same, some muscles removed. 



29. Same, some muscles removed. 



30. Same, some muscles removed. 



31. Same, some muscles removed. 



32. Same, some muscles removed. 



33. Skeleton of the right side of the mesothorax, dorsal view. The mesono- 



tum has been removed. Coxa, trochanter, and femur are shown. (See 

 explanation of abbreviations.) 



Plate 5 



Fig. 34. Skeleton of the left half of the mesothorax, left coxa, trochanter, and 

 femur, ventral view. (See explanation of abbreviations.) 



35. Right mesothoracic spiracle, mesal view. 



36. Articulation of the right hind wing with the metathorax, dorsal view. 



Only the right half of the metanotum and the basal part of the wing 

 appear in the figure. (See explanation of abbreviations.) 



37. Left half of the metathorax, dorsal view. The muscles appear as they 



are seen when the metanotum is removed. The first abdominal 

 tergum is shown in the lower part of the figure. 



38. Same, first abdominal tergum and some muscles removed. 



39. Same, some muscles removed. Coxa, trochanter, and femur shown in 



the lower part of the figure. 



Plate 6 



Fig. 40. Right half of the metathorax and right coxa, dorsal view. Posterior 

 wall of the coxa has been removed to show the muscles inside. 



41. Same, some muscles removed. 



42. Same, some muscles removed. 



43. Same, some muscles removed. 



