206 Journal New York Entomological Society, [vol. xiV. 



7. Anal appendages only 1 wo bahamensis 



Anal appendages four, normal 8 



8. Air tube with three paired tufts posteriorly outwardly, the middle one 



moved laterad out of line, usually situated near or not much beyond 

 the middle of the tube 9 



Air tube with four paired tufts posteriorly outwardly (sometimes increased 

 by additional ones basaliy), the subapical one moved laterad out of 

 line, usually situated at the outer third of the tube 14 



Air tube with four to ten paired tufts along the posterior line in a straight 

 row, none displaced, or the hairs obsolete or absent 18 



9. Body glabrous; air tube 7x1; antennae dark mortificator 



Body spicular or pilose 10 



10. Dislocated tuft of tube well beyond the middle carmodyce 



Dislocated tuft of tube not, or scarcely beyond the middle 11 



ii. Anal processes broad and bluntly rounded 12 



Anal processes long and tapered, rather sharply pointed 13 



12. Air tube subfusiform, tapered on outer half; body spicular. .extricator 

 Air tube gently tapered uniformly; body pilose declarator 



13. Air tube very slightly flared at tip; pecten very long, as long as the 



diameter of the tube at the middle proclamator 



Air tube regularly tapered on outer two-thirds to tip; pecten long hut not 

 equalling half the diameter of the tube inquisitor 



14. Air tube long, over 5x1, the sides nearly straight without marked taper- 



ing 15 



Air tube less than five times as long as wide, the sides curved, tapering 

 rather rapidly after the middle, subfusiform 17 



15. Body glabrous salinarius 



Body spicular-pilose 16 



16. Air tube 8x1, the tufts 3-haired and short; antennae dark, .habilitator 

 Air tube 6x1, the tufts 2-haired and long; antennae pale at base, factor 

 Air tube 7x1, the tufts single and very long; antennae pale. .. .regulator 



17. Air tube 5x1, pecten teeth about 15; subdorsal hairs of abdominal seg- 



ments 3 and 4 double pipiens 



Air tube 4x1, pecten teeth about nine; subdorsal hairs of abdominal 

 segments 3 and 4 single cubensis 



18. Air tube with a subapical crown of spikes; body pilose coronator 



Air tube without a crown of spikes, smooth throughout 19 



19. Air tube with long well-defined tufts 20 



Air tube with small double or single hairs, or bare 31 



20. Body spicular-pilose 21 



Body glabrous or lightly granular 26 



21. Five tufts on posterior margin of tube subequal in length, short; lateral 



abdominal hairs in twos on segments 3 to 5 22 



Five tufts on tube with the basal one very long, the rest progressively 

 shorter; abdominal hairs in threes on segments 3 to 5 23 



