848 CuHaARLES Paut ALEXANDER 
Spiracular disk surrounded by but four lobes, the dorso-median lobe being very reduced; 
inner faces of these lobes, as well as disk itself, entirely unmarked with darker. 
Pupa.— Similar to pupa of H'piphragma solatrix, but differing as follows: 
Cephalic crest (Plate XX XVII, 165) low, the lateral horns shorter, not elevated, and 
directed ventrad or slightly downward; setae on lateral face of spines often projecting 
above (cephalad of) it. Pronotal breathing horns shorter and stouter than in solatriz. 
Spines on eighth abdominal sternite widely separated or interrupted on median line. Male 
cauda (Plate XX XVIII, 169) with dorsal lobes much stouter than in solatriz. 
Neanotype.— Bool’s hillside, Ithaca, New York, May 8, 1917. 
Paratype-— Pupa, Mud Creek, Freeville, New York, May 15, 1915. 
The type pupa has one of the pronotal breathing horns deformed and 
bent caudad so as to be appressed against the body. Needham, who 
has a very much larger series available for study, notes this same peculiarity 
when he states that ‘‘a crumpled horn on one side is of rather common 
occurrence” (Needham, 1903: 284). 
Subtribe Pseudolimnophilaria 
As at present constituted, the division Pseudolimnophilaria includes 
the single genus Pseudolimnophila, but other groups may be added to 
it when the immature stages of other species of the old genus Limnophila 
are made known. The larva is of a distinctly primitive type, the head 
capsule being compact and massive, the mentum chitinized and com- 
pletely divided, each half provided with seven or eight teeth. The 
hypopharynx is a heavily chitinized semicircle with numerous teeth around 
the anterior margin. The antennae bear two elongate apical papillae. 
The mandibles each have two blunt apical teeth and two rows of lateral 
teeth. 
The pupa is similar to that of the Limnophilaria, but the abdominal 
segments have transverse rows of setiferous tubercles. 
The larva shows many points of resemblance to the tribe Limnobuni, 
and the two groups are probably derivable from an immediate common 
ancestor. 
Genus Pseudolimnophila Alexander (Gr. false + Limnophila) 
1919 Pseudolimnophila Alex. Cornell Univ. Agr. Exp. Sta., Mem. 25, p. 917. 
Larva.— Body covered with delicate appressed hairs and numerous erect setae. Spiracul 
disk surrounded by four lobes, the ventral pair very long and narrow, with long fringes © 
hair. Gills four, long and slender. Head capsule massive, the sclerites large, fused 
