4"2ö Osten Sacken: cm the characters of the three divisions of 



very problenuitic family of JCylophagidae niust bc given iip, and 

 its Contents, temporarily at least, unitecl with the Leptidae.^) 



II. Tabular ar ran gern ent of the three groups, 

 with their characters. 



A. Palpi generally four-, or five-jointed, pendulous, and morc or 

 less filiform; antennae many-jointed (more than six-jointed), generally 

 filiform (seldom pectinate), with the majority of the joints of the fla- 

 gellum of a homologous structure. No macrochaetae; no tegulae, 

 bnt the antitegula'^) is almost always distinct; the alula and the axil- 

 lary exeision are but little developed or entirely absent. No discal 

 cell (exceptions: Tipididae, Rhyphidae). Larvae with a distinct 

 head in the shape of a horny Shell, mandibles with a lateral mobility, 

 opposcd to each other like pincers; round-headed larvae, Eu n dköpfe of 

 Marno::*) {Nemocera Latreille; Orthorrhapha nemocera of Brauer). 



I. Nemocera vera. 



No holoptic heads in the male sex; no bisection or bicoloration 

 of the cyes. 



Antennae provided with sensitive hairs arranged symraetri- 

 cally on the flagellum in verticils, or pencils of hair. 

 : (Exception: Mycetophilidae.) 



No ocelli (Exceptions: Mycetophilidae, Lestremina). 



No pulvilli; erapodia offen, but not always, present. 



A. Larvae peripncustic, al- B. Larvae meta-, or amphi- 



ways terrestrial. pneustic, aquatic, subaquatic, 



sometimes terrestrial. 

 Cecidomyidae. Ctdicidae. 



Mycetophilidae. Chironomidae. 



Psyehodidae. 

 (?) Dixidae. 

 ' Tipulidae. 



i) A considerable portion of this last paragraph is a verbat! m re- 

 pro(hiction from niy earlior article : „Sng'gestions" etc. 



•-') I call antitegula wliat is usually called upper tegula, but 

 which lias no name and is generally overlooked, when there is no 

 lower tegula present. It forms a more or less distinct lobe between the 

 ahila and the root of the wing and moves with the wing (difFerent in 

 that from the iower tegula). 



;;) Comparc E. Marno's uscful little paper: Die Typen der Dip- 

 teren-Larven, Verh. Zool. Bot. Ges. 1869. Compare myÄdditions. 



