TABLES OF WYEOMYIA 57 



The following species of Wyeomyia are omitted, as we possess no male speci- 

 mens: 



homotina D. & K. melanocephala D. & K. adelpha D. & K. 



minor D. & K. canfieldi D. & K. agyrtes D. & K. 



bahama D. & K. homothe D. & K. pertinans Will. 



conchita D. & K. clasoleuca D. & K. grayii Theob. 



argyrura D. & K. laiesia How., D. & K. glaucocephala D. & K. 



fratercula D. & K. gynwcopus D. & K. phroso How., D. & K. 



sororcula D. & K. hosautus D. & K. 6orm D. & K. 



agnostips D. & K. o6io D. & K. celmnocephala D. & K. 



guatemala D. & K. panamena D. & K. hapla D. & K. 



megalodora D. & K. coro D. & K. hemisagnosta D. & K. 

 violescens D. & K. 



LAEV.aD (LiMATtrs AND Wyeomyia). 



1. Air-tube with a dense fringe of long hairs on posterior margin 



fW. canfieldi Dyar & Knab (p. 90) 

 \W. pandora Dyar & Knab (p. 89) 

 Air-tube without dense posterior fringe 2 



2. Air-tube attenuated from near base 3 



Air-tube conically tapered or subfusiform 6 



3. Air-tube with false pecten of spine-like hairs 4 



Air-tube without false pecten W. atebela Dyar & Knab (p. 112) 



4. Both pairs of dorsal head-hairs in fives. . W. circumcincta Dyar & Knab (p. 152) 

 Upper pair in twos or threes, lower multiple 5 



5. A double hair behind lateral comb W. autocratica Dyar & Knab (p. 117) 



A quadruple hair behind lateral comb W. trinidadensis Theobald (p. 61) 



6. Air-tube with a false pecten 7 



Air-tube without false pecten 9 



7. False pecten of several teeth beyond the middle of the tube 



W. chalcocephala Dyar & Knab (p. 146) 

 False pecten of two to four teeth before the middle of the tube 8 



8. Comb-scales in an irregular double row; lateral abdominal hairs in part 



multiple W. cacodela Dyar & Knab (p. 130) 



Comb-scales in a patch three rows deep; lateral abdominal hairs in twos 



(~W. pantoia Dyar & Knab (p. 124) 

 W. eloisa Howard, Dyar & Knab (p. 122) 

 W. pseudopecten Dyar & Knab (p. 120) 

 W. onidus Dyar & Knab (p. 126) 



9. A chitinous plate present with the lateral comb of the eighth segment 10 



No such plate present 12 



10. Comb-scales detached from the plate or nearly so 



W. iromeliarum Dyar & Knab (p. 132) 

 Comb-scales situated on the plate 11 



11. Air-tube long, eight times as long as wide. W. symmachus Dyar & Knab (p. 144) 

 Air-tube shorter, four times as long as wide 



W. codiocampa Dyar & Knab (p. 103) 



12. Comb-scales in a patch 13 



Comb-scales in a single row 14 



13. Tube and plate with black basal ring W. aporonoma Dyar & Knab (p. 74) 



Tube and plate without black basal ring. W. hemisagnosta Dyar & Knab (p. 159) 



14. Comb of four well-separated scales L. durhamii Theobald (p. 45) 



Comb of about six scales L. cacopJirades Dyar & Knab (p. 47) 



Comb of about ten to twelve scales 15 



Comb of numerous scales in a long line running well toward ventral side. . . 16 



15. Head-hairs single; anal gills only two W. smithii Coquillett (p. 96) 



Head-hairs double; anal gills four W. chresta Dyar & Knab (p. 140) 



16. Lateral tuft of anal plate double 17 



Lateral tuft of anal plate single 19 



17. Air-tube with a row of small tufts on dorsal aspect 18 



Air-tube with well-distributed single hairs 



fW. seotinomus Dyar & Knab (p. 159) 

 \W. ablabes Dyar & Knab (p. 105) 



