THe CRANE-Fiies or New York — Part II 797 
large and simple in structure; the cardo and stipes are large; the palpus is 
flattened. The antennae have the apical segment or papilla ranging from 
elongate, in Dicranoptycha, to very flattened and disklike, in Limnobia 
and its allies. The mandibles are usually of simple structure, with one or 
two dorsal teeth and from three to seven teeth in the ventral cutting 
row. 
The spiracles are lacking in some species, at least, of Antocha. The 
spiracular disk is surrounded in Rhamphidia by five subequal lobes, in 
Dicranoptycha by four slender, naked lobes; in many Limnobaria the lobes 
are lacking or indistinct. 
The larvae of many of the species are able to spin silken cocoons or 
tubes in which they live. These tubes are open at both ends, and are 
usually covered exteriorly with particles of extraneous matter gathered 
in the larval haunts. 
The pupae usually lack a distinct setiferous cephalic crest, altho one 
is present in Rhamphidia and in Dicranoptycha. The pronotal breathing 
horns are usually large, and are either subcircular, or wider than long (most 
- Limnobaria), rarely elongate (Rhamphidaria), very large, earlike, and 
contiguous or practically so on the median line (Ellipteraria), or branched 
into eight long filaments (Antocharia); in the Dicranoptycharia, how- 
ever, they are microscopic. The abdominal segments on the basal ring 
often show a transverse welt of small hairs or a double convergent row of 
chitinized hooks; in Discobola, Rhamphidia, and Dicranoptycha, how- 
ever, this is apparently not the case, the abdominal armature being more 
eriopterine or hexatomine in appearance. The eighth abdominal seg- 
ment often bears a pair of dorsal spiracles; these are apparently lacking 
in some species (Antocha saxicola) and are small in most Limnobaria, but 
are large and functional in Rhamphidia. : 
The followmg keys separate the subtribes of the tribe Limnobiini: 
Larvae 
1. Body ending in two long vertral lobes; spiracles lacking or very reduced; forms strictly 
EVTTOBWTTC 0 5 0 dice sce NELCHO BIE DCE ORS RecN RE NTIS As oc arcs ects Eee ieee Antocharia (p. 799) 
Bodyagnotjasiakovewspiraclessargeiis cq. sia oc amici aratio pile o kideiaeee eee 
2. Body with ventral and dorsal welts on abdominal SESMENtS :setenige wie seer RRO eee 4 
Bodvauluniventralewelitsonbyparcyn : arate scctalci st sieys sedi oot Soseands sneksctdola Soke, Doiebokd «ates alco 
3. Spiracular disk surrounded by four lobes which are provided with long fringes of hair; 
dorsal welts microscopically spiculose; ventral welts naked; species aquatic. 
Ellipteraria (p. 806) 
Spiracular disk not as above; dorsal and ventral welts alike......... LIimnobaria (p. 808) 
