ENTOMOLOGICAL NEWS. [Nov., 'l6 



parable with the better known Sarracenias, yet seemed to be 

 almost destitute of insect associates other than victims of its 

 traps. For example, with our eastern Sarraccnia purpurca, 

 from Canada to the Gulf, are found E.ryra rolandiana, ITyco- 

 111 via sinithii, Metriocnemus knabi, Sarcophaga sarraccniac 

 (or related species), Papaipema appassionato,, Olethreutes 

 daeckeana, and other less constant associates; in Darlingtonia 

 Mr. Edwards found only numerous small spiders (these are 



also abundant in Sarraccnia) and "invariably among 



the mass of decay some living larvae of a small dipterous in- 

 sect, probably one of the Tipulidae." 



By the examination of numerous freshly-gathered vigorous 

 plants of Darlingtonia furnished me at intervals through the 

 summer of 1915 by Mr. A. A. Heller and Mr. G. M. Pendle- 

 ton, I secured many living examples of the small dipterous 

 larva noticed by Mr. Edwards, and also of another and larger 

 species, both of which I succeeded in rearing in some numbers. 

 The former proves to be closely related to Metriocnemus knabi 

 Coq., the almost invariable associate of Sarracenla pnrpnrca, 

 differing but little in the imago, but as might be anticipated 

 presenting more evident structural divergence in the larva and 

 pupa; for the water-filled leaf of pnrpurea offers to the early 

 stages of knabi a habitat almost strictly aquatic, whereas the 

 new species, which may be called Metriocnemus edwardsi, 

 seems perfectly at home among the insect remains in Darling- 

 tonia as long as they are even slightly moist, and its pupal 

 stage is passed, not as by knabi enclosed in a watery welt-like 

 gelatinous mass on the inner wall of the pitcher, but (in cap- 

 tivity) outside the leaf, naked and loosely adherent to the 

 moist basal portion of the plant or in the adjacent moss, over 

 which it wriggles actively when disturbed. A single egg-mass, 

 probably unfertilized, was obtained by confining the flies with 

 Darlingtonia leaves and moist moss, but as they were not de- 

 tected until after the death of the female which was found 

 clinging to the partially-dried egg-mass, it is possible that 

 further observation may modify the following description of 

 the eggs and their method of (It-position. 



