the Early Stages <?/ Pultostotna schineri. 183 



I liave no hesitation, for tlic other reasons given above, in 

 referring the hirvie to P. sc/iincr/. 



The main {mrposcs of this paper are : (a) description of 

 the ? imago of P. schineri ; (d) (Icseription of the larva and 

 pupa ; (c) de!<eription of the month-parts, and some other 

 strnetnral points, of the ^ imago; (d) sonic discussion of 

 the allinities of Pallnstoinu as indicated by /^ schineri in all 

 its stages, and comparison with the allied Soutii African 

 Kcl/oi/f/iiia barnardi, JOd wards. I am inch-htcd to Messrs. W. 

 K. Thompson and F. Balfour-Brownc, of the Cambridge 

 Zoological Laboratory, for assistance and suggestions. 



One of the ? imagines, with specimens of larvaj and 

 pn|)a}, has been presented to the British iMuseum. The 

 other 9 imago and the hulk of the larval and pupal material 

 are in the Cauibridge University Museum. 



II. Collection of the Material. 



The locality in which the ? imagines were captured is 

 fifteen miles or more from that in which the larvae and pupae 

 were found two years before, but both places are on the 

 course of streams flowing dow n the southern slopes of the 

 range which runs right across the north of the island. 



Tiie two ? imagines were obtained in January 1914 on 

 the Arima River, at an elevation of about GOO feet; the time 

 was about 10 a.m., and the sun Avas shining, but the flies 

 themselves were in a shady place. They were hovering over 

 a spot where a thin film of water rushed over large stones, 

 and they ai)[)eared to Urich to be searching for a suitable 

 place in which to oviposit. He adds that in flight ihev 

 looked like small Tij)uli(ls. He states that he has many 

 times swept foliage on the banks of streams in the Northern 

 llange, but has never succeeded in capturing any Blephaio- 

 ceridae in that way ; he has not observed any on flowers or 

 attacking other insects {cf. p. 193 of this paper), nor has he 

 been attacked by them while b:ithing or at any other time. 



It is noteworthy that the hime and pupoi were taken at 

 an elevation of unli/ about oO feet above sea-level. Urich has 

 found Blepharocerid larvae at various places, mostly in the 

 streams of the Northern Range, from almost sea-level up to 

 2000 feet, al)ove which no observations have been made. The 

 material dealt with here was collected on March 2:2ui\, 1912, 

 in a waterfall in the Diego MaVtin district. The fall ran 

 down very steep smooth faces of rock, interrupted by 

 narrow leilges. Only a very thin sheet of water swept over 

 the cliff, for the dry season was at its height, and in addition 



13* 



