324 AMERICAN PSYCHODIDiE. 



of aiitennse .5 ram. Thorax light yellowish ; abdomen darker, clothed with short 

 black aud white and long da)k hair; legs light, with closely applied white hairs 

 and scales aud scattered erect darker hairs; tarsi lighter than rest of leg; tip of 

 hind tarsi yellowish-brown. Tip of ventral plate narrow, with shallow eniaigi- 

 natioii and rounded lobes; ovipositor concealed in long hair of abdomen. Readily 

 distinguished from P. lanceolata by larger size, much broader and heavier poste- 

 rior fringe, white tuft of long hair at tip of wings, venation and two travsverse 

 black bands on wings. 



Hab. — Oak Creek Canon, Afizona. Two specimens from the 



collection of the Kansas University. Collected by Prof F. H. 



Snow in August. 



Since writing the above the writer has taken a number of speci- 

 mens of Ps. alternata (March), and Ps. horizontala (April). One 

 species of the collection received from the Kansas University, being 

 considerably denuded of hair, was difficult to locate, but is probably 

 Ps. nocturnala. 



An Aquatic Psychodid from Florida. 



On the 19th of December, 1905, the writer collected a few lily- 

 pads and a little hay with wdiich to make a culture for Perameciiwi. 

 After the class had completed the work on the Peramecium the cul- 

 ture was left standing in a large glass jar. In the latter part of 

 January some very large mosquito larvae and pupse were found in 

 the culture, and desiring to find out what species of mosquito they 

 were, a cover was placed on the jar and the emerging of some of the 

 pupse awaited. On the afternoon of February 1st the jar was again 

 examined and a few specimens of the mosquitoes were taken, and 

 along with them some very small fuzzy insects, which were at once 

 found to be flies. The next day on making a closer examination of 

 the contents of the jar a large number of pupre and full-grown 

 larvse were taken. On the morning of February 3rd a single batch 

 of eggs was found. They had been deposited the night before by 

 a female whose wings had become stuck to the glass cover. And 

 again, on the morning of the 6th, a second brood of very young 

 larvse was found. Then all the life histoiT material needed Avas at 

 hand. 



In locating this peculiar little fly, which was found to be a very 

 easy task, so far as the family was concerned, since its superficial 

 characters at once disclosed it to be a moth-fly, the writer was 

 greatly surprised to be unable to find scarcely any literature on the 



