Identification Keys 231 



31. Antennal tuft decidedly over one-third distad, 



longest terminal spine, if turned backward, 

 reaching below tuft. Scales on eighth seg- 

 ment not fringed on apical one-third (reckoned 

 from centre of base to tip). Central tooth of 

 labial plate bluntly rounded and widely sep- 

 arated from adjacent teeth. (Dyar and Knab 

 renamed this " continentalis." ) 



Uranotcenia lowii. 



Antennal tuft scarcely, if any, over one-third 



distad 32 



32. Longest terminal spine almost as long as an- 



tenna; accessory spine on terminal joint not 

 nearly reaching to tip of joint. Scales of 

 eighth segment not fringed on apical one-half. 

 Central tooth on labial plate bluntly rounded 

 and not widely separated from the adjacent 



teeth Uranotamia sappJiirina. 



Longest terminal spine scarcely two-thirds length 

 of antenna, scarcely reaching tuft ; secondary 

 spine on terminal joint reaching nearly to tip 

 of joint. Scales of eighth segment with a 

 fringe of uniform spines extending over apex. 

 Central tooth of labial plate sharp, distinct 

 from the adjacent teeth. (Dyar and Knab re- 

 named this " coquilletti.") 



Uranotcenia socialis. 



33. Head tufts A and B with more than three 



hairs 34 



Head tuft A never with more than three hairs. 35 



34. Comb an even row of six teeth, secondary spines 



of scales stout. Spines of tube five or six, 

 regularly placed. Ventral tuft of ninth seg- 

 ment reaching nearly to cephalic margin of 

 chitin. Tuft of tube of five or six compara- 

 tively short hairs decidedly above middle ; 

 tube not less than three times as long as great- 



