VIII] SPECIES OF ANOPHELIN^E 79 



Dichotomous Table shewing Natural Grouping of Species 

 of Anophelince. 



1. Costa has less than four main dark spots . . . . . . . . 2 



Costa has at least four main dark spots .... . . . . 6 



2. Costa without any pale interruption even at apex . . . . 3 

 Costa with at least one pale interruption . . . . . . . . 4 



3. Female palps with second segment disproportionately long 



Group i. (Stethomyia.} 

 Female palps of ordinary Anopheline type 



Group 2. (Anopheles.) 



4. No true scales on mesothorax . . . . . . . . . . 5 



Mesothorax with true scales . . Group 5. (Arribalzagia.) 



5. Wing veins without mixed dark and light scales 



Group 3. (Patagiamyia.) 

 Wing veins with mixed dark and light scales 



Group 4. (Myzorhynchus.) 



6. Not more than three dark spots on sixth vein . . . . . . 7 



More than three dark spots on sixth vein Group 12. (Neomyzomyia.) 



7. Terminal segment of female palps considerably less than half length of 



penultimate segment . . . . . . . . . . . . 8 



Terminal segment at least half length penultimate . . . . 9 



8. Mesothorax without true scales . . Group 6. (Myzomyia.) 1 

 Mesothorax with true scales . . Group 7. (Pyretophorus.) 1 



9. Mesothorax not clothed with true scales Group 8. (Pseudomyzomyia.) 1 

 Mesothorax covered with true scales . . . . . . . . 10 



10. Abdomen without lateral tufts .. .. .. .. .. n 



Abdomen with lateral tufts .. .. Group n. (Cellia.) 



IT. Palps very shaggy as in Myzorhynchus Group 10. (Myzorhynchella.) 



Palps not so shaggy . . . . . . Group 9. (Nyssorhynchus.) 



Table shewing Detailed Tabulation of Species of 

 Anophelince. 



A. Protoanopheles. 



Number of main dark costal spots is less than four. 

 Junctions of cross-veins with longitudinal veins and bifurca- 

 tions of second and fourth veins dark scaled. 



A'. Costa devoid of any pale areas even at apex of wing. 



Group i. Female palps with the second segment disproportionally long, 



segments three and four both being short. 

 (Stethomyia. Theobald. Type species S. nimba. Theo.) 

 General characters of groups. 



Appearance. Attitude Culex-like, legs thin and slender. Palps 

 long and thin. 



1 Vide, however, remarks on the type species of these genera and nomen- 

 clature. 



