AQUATIC INSECTS IN NEW YORK STATE 331 
11 Thorax enlarged; abdomen usually with 
long hairs; usually a complex respira- 
Mimarpparacus ab the amal end... 2.2 sees ee ere eens Culicidae 
Ready, much elongated... ...0..%....65. (12) 
12 Last segment of the abdomen with two 
Fee aM POUELES Pes sb xr <1 a af ci acuepeetioas siererlare coals shite: o:l6) oeai ace anete ule Rhyphidae 
Last segment tapering, often with a few 
long hairs. Body snakelike, segments of 
nearly uniform length. (Ceratopogon).......... Chironomidae 
13 With anal prolegs and blood gills. (Chi- 
eS May PUS, CEC) cscs cs cece ccc ae du ees Chironomidae 
Without anal prolegs; a broad abdomen, 
with a terminal sucker; head with a 
pameor tanlike organs (black flieS)..... ccc ccen cece: Simuliidae 
14 With rudimentary mouth parts; body with 
13 segments; peripneustic (i. e. spiracles. 
on the median segments). Gall gnats......... Cecidomyiidae 
With biting jaws. Head incomplete, _ 
small, retractile, not containing nerve 
ganglia; 12 body segments; posterior 
stigmata usually with some fleshy fila- 
PE me Me TAINO! MUGS) ursg'5 0 ok S a\ala "ee ols iw Be ek ss wie bee w woe Tipulidae 
Pupae 
1 Prothoracie spiracles, if present, borne on 
appendages (Nematocera)........... (2) 
Beounonseie SpiraGleS Sessile... 6.0 cs cal ce ce ee es Brachy cena 
2 Nonaquatic. Leaf miners or gall makers 
(Cecidomyiidae); larvae living in fungi 
(Mycetophilidae); larvae living in the 
earth (Bibionidae); larvae living under 
bark (some Ceratopogon) 
MAIC SOP -SCINIAQUATIC. ....c0n0c eee ee (8) 
3 Pupae in a fibrous cocoon......... hove te (A) 
Without cocoon, sometimes in the old lar- 
all ESS 00)  S  e  e (5) 
A Cocoon cornucopialike, the coarse thoracic 
filaments of the pupa projecting. These 
Hianients are usually few in mumber.......ccseevdes Simuliidae 
Thoracic filaments of the pupa if present, 
entirely within the cocoon, the latter 
TOW AWVERUDCVIINGIIC. oye cee wc vecatvace Some Chironomidae 
5 Body convex, hard shelled, and attached 
MMIpetiice TO The: POG. «scares cevenes (6) 
Not attached nor limpetlike........... (7 
6 Shield-shaped, flattened. Thoracie breath- 
ing tubes are Subcylindricl..........sesees Some Psychodidae 
———— --— 
1See Professor Kellogg’s paper in Hnt. News, Feb. 1901. 
