LEONARD HASEMAN. 325 



life history of the North American members of tliis family. Prof. 

 Kellogg's account of Pericoma californica Kin. contained our pres- 

 ent knowledge of the life history of the North American Psychodi- 

 dfe. PsycJioda cinerea Banks was reare<l on manure by Kincaid, 

 but the younger stages were not secured. Professor Kellogg also 

 mentions the discovery of two pupse in a small stream in the Rocky 

 Mountains of Colorado, which he thinks are Psychodid pupse, but 

 different from the pupse of P. californica. The thoracic breathing 

 tubes are long, tapering and flexible, but the flat, adherent, shield- 

 shaped body is as in P. californica. 



The life history and breeding habits of a number of the Euro- 

 pean Psychodids have been studied in detail. Verrall bred Ps. 

 humeralis Meigen from putrid snails, and Gunerthal bred the same 

 from larvse feeding on rotten potatoes, C. O. Waterhouse reared 

 Ps. albipennis Zetterstedt upon decaying turnips, and it was also 

 bred upon other decaying vegetable matter. The larvje of Ps. 

 phalcenoides Linne has been found to feed upon all sorts of decay- 

 ing vegetable matter. The larvse of some European Psychodids 

 have been found to feed upon cow-dung. 



The account of the aquatic Psychodid larvso and pupse discovered 

 by Fritz Miiller in Brazil some twenty six years ago, and the paper 

 by Miall and Walker on the life history of Pericoma canescens, 

 together with other notes on tiie early stages of Psychodidse, are 

 found in the "Trans. Ent. Soc. Lond., 1895." Through the kind- 

 ness of the Kansas University the writer has recently had an oppor- 

 tunity of reviewing these papers. 



Haliday has characterized the different groups of larvse of the 

 European Psychodids as follows : 



Larva pale, terrestrial, the last segment slender, much elongated. 



Psyclioda. 

 Larva blackish, last segment little elongated, jagged at the end and ciliated with 

 radiating hairs. 

 Larva with two double lows of lanceolate (gill-like) plates down the back. 



Uloniyia. 

 Larva with two bands of curved hairs down the back Pericoma. 



The larvse of the genera Pericoma and Ulomyia are reported as 

 inhabiting water, while the larvse of Psychoda are described as 

 terrestrial, feeding upon mushrooms and decaying potatoes. The 

 Florida larvse, while not terrestrial, agree in other details much 



TRANS. AM. ENT. SOC. XXXIII. OCTOBEB, 1907. 



