R. W. CROSSKEY 



318 





A^§^>' 







319 



m 



320 



321 



322 



323 



324 



Figs. 318-324. Simulium (Dexomyia) atlanticum sp. n., characters of the larva and pupa. 



318, end of larval abdomen in dorsal view, with enlargement showing setae and spinules. 



319, showing spinules and rugose surface of larval abdominal cuticle. 320, rectal gills of 

 larva. 321, thorn-like tubercles of pupal thorax. 322, pupal gill, with enlargement of 

 sculpture. 323 and 324, ventral (323) and dorsal (324) views of pupal abdomen with 

 enlargements of cuticular armature on the segments indicated. 



