60 [March, 



10. Finger gradually narrowed from before the centre to the 



apex, the latter obtusely pointed (fig. 23) .farreni 



Finger of nearly even width from centre to apex or only the 

 apex narrower 11 



11. Eighth tergite with distal edge incurved, the upper 



portion of the tergite therefore projecting as a broad 

 lobe (fig. 21) rusticus 



Eighth tergite nearly evenly rounded 12 



12. Eighth tergite with more than fifteen bristles at and near 



the dorsal margin posteriorly to the stigma (fig. 31)... 



vagabrmda 



Eighth tergite with ten or less bristles at and near the 

 dorsal margin 13 



13. Finger measured from the most ventral point to the upper 



anterior angle has the notch of the anterior side in the 

 centre ; bristles ' of eighth sternite stiff and rather 

 strong (fig, 26) garei 



Finger measured from the most ventral point to the upper 

 anterior angle has the notch of the anterior side at *j ^ 

 from the bottom ; bristles of eighth sternite slender 

 (fig. 35) gallinae 



14. Females — Occiput with three complete rows of bristles (fig. 13) 



...gallinulae 



First and second row represented at most by two bristles ... 15 



15. Basal abdominal sternite with numerous lateral bristles styx 



Basal abdominal sternite with one or no lateral bristles 16 



16. Eighth tergite with upper angle of widened portion produced 



as a sharp beak-like hook (fig. 22) riisticus 



Eighth tergite with upper angle of widened portion rounded 

 off or obtusely angulate 17 



17. Seventh sternite very deeply sinuate, the ventral lobe (in a 



lateral view) narrow and long (fig. 25) .farreni 



Seventh sternite with upper angle only produced as a lobe 

 (fig. 34) horealis 



Seventh sternite rounded or truncate or the sinus quite 

 shallow 18 



