722 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 47. 



Plate 31. 



Females of Salmincola oquassa, S. bicauliculata and S.falculata. 



Fig. 36, side view, S. oquassa. Fig. 37, dorsal view of head. Fig. 38, second an- 

 tenna. Fig. 39, first maxilla. Fig. 40, maxilliped. Fig. 41, side view, S. bicaulicu- 

 lata. Fig. 42, dorsal view of head. Fig. 43, side view, -S./o^euZata. Fig. 44, dorsal 

 view of head (inverted). 



Plate 32. 



Females of Salmincola ihymalli, S. inermis, and S. beani. 



Fig. 45, side view, S. thymalli. Fig. 46, dorsal view of head. Fig. 47, side view, 

 5. inermis. Fig. 48, dorsal view of head. Fig. 49, first antenna. Fig. 50, second 

 antenna. Fig. 51, first maxilla. Fig. 52, side view, S. beani. Fig. 53, dorsal view 

 of head. 



Plate 33. 



Females of Salmincola carpenteri and S. gibber. 



Fig. 54, side view, 5. carpenteri. Fig. 55, dorsal view of head. Fig. 56, second 

 antenna. Fig. 57, mandible. Fig. 58, first maxilla. Fig. 59, maxilliped. Fig. GO, 

 side view, yoimg female, showing genital process. Fig. 61, side view, S. gibber. Fig. 

 62, dorsal view of head. 



Plate 34. 



Females of Achtheres corpulentus and A. micropteri. 



Fig. 63, dorsal view, A. corpulentus (after Kellicott). Fig, 64, dorsal view, A. 

 micropteri. Fig. 65, ventral view of antennae and mouth parts; a* and a^, first 

 and second antennae; tnx, first maxilla; mxp, maxilliped. Fig. 60, first antenna, 

 enlarged. Fig. 67, mandible. 



Plate 35. 

 Females of Achtheres micropteri and A. lacae. 



Fig. 68, side view, A. micropteri. Fig. 69, dorsal vdew of head. Fig. 70, side view, 

 A. lacae. Fig. 71, dorsal view of head. Fig. 72, month tube, first and second an- 

 tennae and first maxilla. Fig. 73, second antenna, side view. Fig. 74, maxilliped. 



Plate 36. 

 Female of Achtheres coregoni and male of A. ambloplilis. 

 Fig. 75, side view, A. coregoni. Fig. 76, dorsal view of head. Fig. 77, side view 

 of antennao and mouth parts, enlai^cd. Fig. 78, second antenna. Fig. 79, maxil- 

 liped. Fig. 80, ventral view of posterior trunk, showing small abdomen. Fig. 81, 

 side view, A. ambloplitis. Fig. 82, first and second antennao and mouth tube. Fig. 

 83, second antennao from inner sido. Fig. 84, first maxilla. Fig. 85, maxillipeds. 



Plate 37. 



Female of Achtheres ambloplitis. 



Fig. 86, dorsal view. Fig. 87, side view. Fig. 88, dorsal view of head. Fig. 89, 

 ventral view of antennae and mouth parts. Fig. 90, mandible. Fig. 91, bulla. 



Plate 38. 

 Female of Achtheres pimelodi. 

 Fig. 92, dorsal view. Fig. 93, side view. Fig. 94, dorsal view of head. Fig. 95, 

 antennae and mouth parts, lettering as in &g. 65. 



