TuE CRANE-FLIES OF New York — Parr II 969 
Labrum narrow, apex evenly rounded. Labial lobes stout, separated by labrum, at tip 
arrowed and somewhat pointed. Maxillary palpi long and stout, just beyond base bent 
rongly backward. Antennae rather short, bases not widely separated (Plate LXXXIV, 
56). Thorax very deep, much flattened anteriorly (Plate LXXXIV, 455). Pronotal 
reathing horns short, cylindrical, slightly divergent, apex of each a little expanded. Meso- 
otum at declivity with two flattened plates, which are blunt and directed cephalad and 
ightly laterad; above wing axil a smaller tubercle. Wing sheaths ending just before apex 
ff second abdominal segment. Leg sheaths ending just before apex of third abdominal 
gment; tarsi ending about on a level. 
Abdomen strongly depressed, lateral margins carinate; segments distinct, unarmed, sub- 
ivided into a narrow basal ring and a much broader posterior ring; segments 2 to 5 a little 
nger than segments 6 and 7. Male cauda with valves divided into two rounded lobes 
y a small median notch. Female cauda with dorsal valves straight, a little longer and 
uch stouter than the slender sternal valves. 
Nepionotype.— Westhclme, Vancouver Island, B. C., May 15, 1917. 
Neanotype.— Female pupa with type larva. 
enus Liogma Osten Sacken (Gr. smooth + furrow) — 
1869 Liogma O.S. Mon. Dipt. N. Amer., part 4, p. 298. 
Larva.— Body covered with elongate, leaflike projections, dorsal ones with one or two 
eth on anterior convex face. Spiracular disk surrounded by four lobes. Head capsule 
iompact. Mentum with about fourteen teeth. 
Pupa.— Metanotum and abdominal tergites with elongate spines, branched in L. glabrata, 
mple in L. nodicornis. 
The genus Liogma includes three known species, of which the genotype, 
iogma nodicornis (O. §.), is American. The adult flies of this species 
re sluggish, and are found resting on vegetation growing in and about 
haded ponds and similar situations. a 
In Europe the life history of LZ. glabrata (Meig.) has been ranked out 
y De Rossi (1876), by Wesenberg-Lund (1915:347-348), and in con- 
iderable detail by Miiggenberg (1901). The larvae were found in the 
oods near Berlin, in wet, grassy spots where the moss Hypnum squarrosum 
rch. & Schp. occurs. The complete metamorphosis of the insect takes 
ne year, the larval life requiring the greater part of this period. The 
ge stage lasts from eight to ten days and the pupal stage from eleven to 
welve days. The duration of adult life is not known, but it is certainly 
hort, occupying but a few weeks at the most. 
Near Berlin the flies emerge during the first half of July. The males 
jppear first, the females later, and the latter are always seized in copulation 
