60 



( Dorsal shield in both sexes divided or 

 6| nearly divided iuto two parts. . .7. 

 i Dorsal shield, even in nyniphs undivided 8. 

 C? movable finger of mandible about as 



long as fixed one Cyrtolaelaps Berl. 



cf movable finger of mandible enorm- 

 ously developed, cultrate; fixed finger 



very small Euryparasitus Oudms. 



^Jugular sbields single; no accessory claws Neoparasitus Oudms. 

 | Jugular sbields double;two accessory claws Hydrogamasus Berl. 

 9 Only one genus Macrocheles Latr. 



10 Only one genus Pseudoparasitusöudms. 



1 1 Only one genus Pachylaelaps Berl. 



12 Only one genus Haemogamasus Berl. 



12. Greenia Oudms., nov. gen. 



(With Plate II, fig. 30—35) 



As the male is unknown, it is not certain to which subfamily 

 this insect belongs. As to the general habitus (Fig. 30), it may 

 be a member of the subfamily of Parasitinae, or of the Laelap- 

 tinae. The undivided dorsal shield, the simple epistoma (Fig. 33), 

 the elongate genital shield (Fig. 31), however, induce us to place 

 it in the subfamily of Laelaptinae. 



As the stigma misses a tubular peritrema (Fig. 31 and 35), the 

 nearest related to Iphiopsis. But it differs from this genus in 

 the presence of claws on the lst leg. 



Named in honor of Mr. Edward Ernest Green, Tea Planter, Eton 

 Estate, Punduloya, Ceylon, investigator of Coccidae, discoverer of 

 the symbiosis between Koptorthosoma and Greenia. 



13. Greenia perkinsi Oudms., nov. sp. 



(With Plate II, fig. 30—35). 

 Named in honor of Mr. R. C. L. Perkins, who first directed the 

 attention of investigators to the symbiosis of Koptorthosoma and 

 Greenia, discovered by Mr, E. E. Green of Ceylon. 



