361 



2. Heteromyia festiva Loew 



Ceratopogon fesUvus Loew, Berl. Ent. Zeitsehr., Vol. 5, 1861, p. 314, sp. 13. 



This species was originally described from Pennsylvania by Loew, 

 and has subsequently been recorded from New Jersey by Smith. 



3. Heteromyia clavata Williston 



Heteromifia clavata Williston, Biol. Cent. Amer., Dipt., Vol. 1, 1900, p. 225. 



This species was originally described by Williston from Vera 

 Cruz. Mexico, and has not been subsequently recorded as far as I am 

 aware. 



4. Heteromyia pratti Coquillett 



Heteromyia pratti Coquillett, Proc. U. S. Nat. Miis., Vol. 2.5, 1902, p. 88. 



This is the only species of the group which I have seen. The spec- 

 imen was submitted by Mr. A. C. Burrill, and was taken by him at 

 Monona Lake, Wis., July 13, 1912. The species was originally de- 

 scribed by Coquillett from St. Elmo, Va., and has not subsequently 

 been recorded as far as I am aware. 



TANYPIN^ 



Apparently no larval characters found in the described species of 

 this subfamily can be used to separate genera, and the small amount of 

 reared material before me does not warrant my attempting a generic 

 synopsis of larvse or pup?e. Few species in the Laboratory collection 

 can be associated in larval, pupal, and imaginal stages, since in several 

 cases of rearings either the larval or pupal exuvice, or both, were not 

 preserved. Very careful rearing of species, and isolation of single 

 larvae during the process, will be required before all of the stages of 

 some of the species can be definitely associated. 



Diamesa zvaltlii presents in the wing venation an approach to the 

 Tanypincc, but the larva is typical of the Chirouomiucc, and the adults 

 show also the sexual differences present in that subfamily in which I 

 have placed it. In no species in Tanypincc that I am acquainted with 

 have the antennse more joints in the male than in the female, and in 

 every species that I know in the larval stage in Tanypincc the labium 

 of the larva is of a very different structure from that of zvaltlii. 



The larvae of some of the species of Tanypincc are abundant in 

 permanent streams, pools, and lakes. Lender natural conditions the 

 larvae are said to live in burrows in the same manner as the Chiro- 

 noniincc. Johannsen says that in captivity they seldom seem to make 



