Vol. XXVli] ENTOMOLOGICAL NEWS. 389 



This insect, which I provisionally describe under Metrioc- 

 nemits, eventually may find its place in a related genus ; knabi 

 already has been separated by a European student of the group, 

 who finds that it has well-developed pulvilli, a character which 

 I have been unable to detect in edzvardsi ; slides of the $ geni- 

 talia of the two species indicate that in knabi the keel is shorter, 

 slighter and more transparent, and the lateral lobes propor- 

 tionately shorter and broader. The presence of larvae of 

 edwardsi in almost every suitable leaf of Darlingtonia contain- 

 ing insect remains indicates that its association with this plant, 

 like that of knabi with pnrpnrca, is habitual, and possibly ex- 

 clusive. 



In the leaves of Darlingtonia, along with the larvae of Me- 

 triocnemus and as far as was observed living in amicable rela- 

 tionship with them, was found another dipterous larva sharing 

 the same food-supply of captured insects. The larvae of the 

 two species, often more or less entwined in their confined 

 quarters, are not conspicuously different in size or form though 

 separable to the naked eye by their different methods of pro- 

 gression ; under low magnification it becomes immediately ap- 

 parent that their relationship is remote. Eggs and empty pu- 

 paria were also found in abundance in the leaves, and from the 

 larvae numerous flies were bred to maturity. These prove to 

 belong to the family Chloropidae, and, I am informed, belong 

 to one of the three or more species standing in American col- 

 lections under the name of Botanobia trigramina Loew ; tri- 

 gramnm was described from the District of Columbia, its size 

 is given as only about half the average and much less than the 

 apparent minimum size of the present species, for which I 

 propose the name of 



Botanobia darlingtoniae n. sp. (Diptera: Chloropidae.) (Plate 



XXI.) 



The eggs of this fly are deposited singly on the inner wall 

 of the leaf, above the mass of insect remains and often well up 

 toward the orifice of the pitcher ; they are not strongly adher- 

 ent and are frequently wedged under the fine elastic hairs 

 which clothe the leaf-wall. From one to twenty eggs may be 



