S285 CHARLES Patt ALEXANDER 
Pupa.— Length, about 12 mm. (cast skin). 
Labrum broad, rounded at apex. Labial lobes broadly transverse, caudal margin 
indistinctly trilobed. Maxillary palpi large, flattened, apex bluntly pointed; a rather angular 
tooth on margin near base (Plate XXXI, 128). Cheeks produced into flattened ledges. 
Antennae short and stout. 
Pronotal breathing horns (Plate XX XI, 129) elongate for this subtribe, about three times 
as long as the greatest diameter, flattened, apical half slightly expanded, margin with tiny 
tubercles. Wing sheaths attaining base of abdominal segment 3. Leg sheaths attaining 
base of abdominal segment 5; tarsi ending about on a level, or hind tarsi a little the shorter 
and fore tarsi a little the longer. Abdomen with basal bands of setae on tergites 3 to 7 
and sternites 5 to 7, and on the extreme lateral parts of sternites 3 and 4; these bands thickly 
margined with tiny, golden-yellow hairs or points, the median part of each band naked or 
nearly so. Male cauda (Plate XXXI, 130) with dorsal lobes (Plate XX XI, 131) very small, 
more or less flattened, divergent, MELEE blunt at tips; ventral lobes elongate, contiguous 
along inner face. 
Nepionotype.— Potomac Park, D. C., May 11, 1913. 
Neanotype.— Cast pupal skin, with type larva, ee 14, 1918. 
Paratype.— One larva with type. 
Subtribe Dicranoptycharia 
The subtribe Dicranoptycharia, so far as known, includes only the 
genus Dicranoptycha. The division is close to the Rhamphidaria but 
is easily separated from it in all stages. 
Genus Dicranoptycha Osten Sacken (Gr. fork + fold) 
1818 Marginomyia Meig. Syst. Beschr. Zweifl. Ins., vol. 1, p. 147 (nomen nudum). 
1859 Dicranoptycha O. 8. Proc. Acad. Nat. Sci. Phila., p. 217 
Larva.— Form very elongate, terete. Integument smooth, glassy, transparent. 
Abdominal segments 2 to 8 each with a basal transverse band or area of microscopic chitinized 
points on ventral surface; segment 8 with a similar band on dorsum. Spiracular disk sur- 
rounded by four lobes, the lateral pair more slender than the blunt ventral pair; dorsal lobe 
very low or lacking; a triangular brown mark on disk between spiracles. Spiracles small, 
widely separated. Anal gills a fleshy protuberant ring surrounding anus. 
Head capsule compact, massive, the prefrons large with a few marginal punctures; externo- 
lateral plates very broad. Labrum large, flattened, pale. Antenna two-segmented; apical 
segment almost as long as basal segment, gradually narrowed to the blunt tip. Mandible 
with a blunt dorsal and two blunt ventral teeth. axilla generalized in structure. Hypo- 
pharynx a rounded ‘cushion. Mentum deeply split behind but not completely divided, 
with three principal teeth and a small reduced lateral tooth on either side. 
Pupa.— Cephalic crest low, depressed, setiferous. Labrum tumid. Labial lobes oval, 
contiguous. Antennal sheaths ending opposite base of wing pad. Pronotal breathing 
horns microseopic, represented only by tiny triangular tubercles. Mesonotum unarmed. 
