848 Charles Paul 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 Epiphragma fsolatrix, but differing as follows : 

 Cephalic crest (Plate XXXVII, 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 solatrix. 

 Spines on eighth abdominal sternite widely separated or interrupted on median line. Male 

 Cauda (Plate XXXVIII, 169) with dorsal lobes much stouter than in solatrix. 



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 Limnobiini, 

 and the two groups are probably derivable from an immediate common 

 ancestor. 



Genus Pseudolimnophila Alexander (Gr. false + Lwinophila) 



1919 Pseudolimnophila Alex. Cornell Univ. Agr. E.\p. Sta., Mem. 25, p. 917. 



Larva.' — Body covered with delicate appressed hairs and numerous erect setae. Spiracular 

 disk surrounded by four lobes, the ventral pair very long and narrow, with long fringes of 

 hair. Gills four, long and slender. Head capsule massive, the sclerites large, fused. 



