110 EAST AFRICAN POLYDESMOIDEA— COOK. vol. xviii. 



Platf: III. 



Astrodesmus stellifer. 



Fig. 1. Dorsal view of first three segments. 



2. Siibdiagrammatic cross section of a segment. 



3. Dorsal view of the last three segments. 



4. Lateral view of same. 



5. Preaual scale. 



6. Gnathochilarium, including hypostoma. 



7. Plan of the eighth joint of an antenna. 



8. Last three joints of an antenna. 



9. Ventral view of the fourteenth and fifteenth segments of male, showing the 



process of the fifteenth and the corresponding depression of the fourteenth. 



Aulodesmus oxygonus. 



10. Sixth and seventh segments, ventral view, after Peters. 



11. Fifteenth segment, ventral view, after Peters. 



12. Posterior view of a segment, after Karsch. 



13. Male genitalium, lateral view, after Peters. 



14. Curve of the tooth of same, ventral view, after Karsch. 



Tycodesmus falcatus. 



15. Genitalium, ventral view, after Karsch. 



16. Same, median view, after Karsch. 



Aulodesmus mossambicus. 



17. Posterior view of segment, after Peters. 



18. Genitalium, lateral view. 



Plate IV. 

 Marptodesmus chanleri. 



Fig. 1. Dorsal view of head and first three segments. 



2. Antenna. 



3. Fifteenth leg of male, anterior view. 



4. Third leg of male, posterior view. 



5. End of last joint of same, more magnified, anterior view. 



6. Last five segments, dorsal view. 



7. Last four segments, lateral view, 



8. Preanal scale. 



9. Male genitalia in situ and ventral parts of sixth and seventh segments. 



10. Lateral view of male genitalium, more magnified. 



Astrodesmus htridus. 



11. Genitalium, lateral view. 



12. Same, ventral view. 



Orodesmus forceps. 



13. Male genitalia, in situ. 



14, 15. Lateral views of male genitalia, more magnified. 

 16. Last three segments, more magnified. 



