290 



8. Apical abdominal appendages each with 3 long terminal hairs 



Metriocnemus, pt. 



— Apical abdominal appendages each with 2 short and inconspicuous 

 hairs before apices Ortliocladins, pt. 



Important Papers on North American Chironomoidea* 



Johannsen, 0. A. 



'05. Aquatic Nematocerous Diptera. II. Bull. N. Y. State Mus., 

 No. 86:76-315. (This paper contains descriptions of all species 

 of Tanypinae and Chironominae that had appeared in North 

 America up to the time of its publication, and a very full bibliog- 

 raphy of the superfamily Chironomoidea.) 



'08. New North American Chironomidae. Bull. N. Y. State Mus., 

 No. 124:264-285. (Contains a few keys to genera and species 

 supplementary to those of the previous paper, and also a small 

 additional bibliography.) 

 Malloeh, J. R. 



'15. The Chironomidae or midges of Illinois, with particular refer- 

 ence to the species occurring in the Illinois River. Bull. 111. State 

 Lab. Nat. Hist., Art. VI, 10: 275-543. (Contains keys to genera 

 and recognizably described species of North American Cera- 

 topogonidae, and keys to larvae and pupae of some Chironomoi- 

 dea. 



'15. Some additional records of Chironomidae for Illinois and notes 

 on other Illinois Diptera. Bull. 111. State Lab. Nat. Hist., Art. 

 IV, 11:305-363. (Contains descriptions of some genera and 

 species not included in the previous paper, and notes on habits.) 



Family ORPHNBPHILIDAB 



I have not seen the larva or pupa of this family. There are but 

 two genera in the family, Orphnephila, containing three species, and 

 Androprosnpo, with two. Only one species of Orphnephila is record- 

 ed as occurring in North America, the other genus being entirely un- 

 represented here as far as we know at present. The following gen- 

 eralizations for larval and pupal stages are taken from Tliienemann's 

 descriptions of tlie inunature stages of Orphiicphila tcstacea Rnthe, 

 a European species occurring in the United States. 



Because of my failure to obtain the early stages of this family I 

 have not inchided it in mv keys to the larvae and pupae of Nematoc- 

 era. 



*As previous authors have included in Chironomidae all the families I have now 

 pTit in Chironomoidea I have listed papers dealing ostensibly with the Chironomidae 

 under the superfamily, in accordance with the arrangement of the present paper. 



