BLOOD -SUCKING FLY (sIMULIUM). 91 



Described from five specimens taken by Mr. E. E. Green and Mr. 

 Gravely at Peradeniya, Ceylon, VII., 1911 (type), XII., 10 and 

 2, VI., 10 (alt. 1,500-1,600 ft.). 



Type in Indian Museum. 



N.B. — In one specimen the frons is of equal width throughout, 

 in the others of triangular form, broad at the vertae, and narrowing 

 gradually to just above the antennae. This is the case with the 

 other species previously described by me, and it may be a question 

 of shrinkage, the eyes in most females being much sunken in dried 

 specimens. The striped thorax will distinguish this species at once 

 from all other Oriental ones. The thoracic stripes are by no means 

 as distinct as shown in the figure. 



It may be opportune to mention here that in my description of 

 Simulium rufithorax^ an error has crept in. It is said there that 

 the last joint of the palpi is the largest. It should be the first joint. 



See Plate following Dr. Annandale's Paper. 



Figs. 4-6. — Simulium striatum,, sp. nov. 

 Fig. 4. — Lateral view of the fly from the left side, X 16. 

 Fig. 5. — Thorax and scutellum from above, x 27. 

 Fig. 6. — Outline of wing, x 27. 



N.B. — In my '-Notes on Ceylon Diptera " (8poI. Zeyl. , Vol. VI., 

 p. 170), referring to Pycnosoma fiavipes Meg., I stated it caused an 

 outbreak of smallpox. This was a lapsus for cholera. 



* Rec. Ind. Mus. , IV. , 282. 



