ANTENNAE IN G. CALIGINEA AND G. PALPALIS. 31 



descending so much posteriorly {i.e. lower margin of eye nearer 

 to lower margin of head on each side) ; frontal stripe chestnut ; 



Fig. 11. 

 Antenna of Glossina caliginea, Au.sten. (X 30.)* 



Fig. 12. 

 Antenna of Glossina palpalU, Eob.-Desv. (x 30.) 



frontal margins (sides of front or parafroiitals) varying from 

 light mouse-grey to olive, often darker than in G. palpalis, 



* The author desires to acknowledge his indebtedness to the Entomo- 

 logical Research Committee (Tropical Africa) for the loan of the blocks for 

 this and the two following figures. 



