868 CHARLES PAUL ALEXANDER 



acute tooth; in axil of latter a small flattened blade which is slightly widened outwardly and 

 has the tip truncated. Maxillary lobe broad at base, tapering to narrow tip. 



Pupa. Length, 12 mm. 



Depth, d.-v., 1.6 mm. 



Similar to Limnophila macrocera in general shape and color, differing as follows: 

 Labrum broadly obtuse at tip. Pronotal breathing horns (Plate XLIII, 203) very short, 

 stout but flattened, constricted beyond midlength, and with a row of breathing pores around 

 apex; pronotum and mesonotum carinate medially in front; wing pad showing venation rather 

 clearly, cell Mi deep, basal deflection of Cm beyond midlength of cell 1st Mz- Abdominal 

 segments with lateral margins very deeply incised, the carinate lateral margins very accentu- 

 ated, appearing as thin, flattened wings (Plate XLIII, 204). Armature of abdomen consist- 

 ing of abundant elongate, acicular spines, some of which are sinuously twisted; on basal ring 

 these spines appearing as a subterminal transverse row on both dorsum and sternum; on 

 posterior ring, besides the subterminal transverse row, spines are scattered over surface in 

 more or less distinct longitudinal rows; at lateral carina a group of about a dozen long spines 

 at caudal margin, as well as a powerful spine below level of spiracle on extreme margin of 

 carina; ventrad and caudad of this, three long setae, two close beneath spine and the third 

 underneath spiracle. Female cauda (Plate XLIII, 202) about as in Limnophila macrocera, 

 but sternal valves divergent at their tips; eighth segment with a trapezoid of dorsal lobes 

 about as in L. macrocera, but sternum with four stout spines bearing setae on their sides; 

 a blunt median lobe near base of eighth sternite. 



(Described from a female pupa taken on Bool's hillside, Ithaca, New York, on June 4, 

 1917, where it was associated with a characteristic swamp-inhabiting crane-fly fauna 

 Bittacomorpha clavipes, Pseudolimnophila luteipennis, Limnophila macrocera, Pilaria recondita, 

 and Prionocera fuscipennis.) 



(Subgenus Limnophila Macquart) 



1834 Limnophila Macq. Suit. & Buff., vol. 1, Hist. Nat. Ins., Dipt., p. 95. 

 1863 Poecilostola Schin. Dipt. Austriaca, vol. 2, p. 551. 



Limnophila is the typical subgenus of the group, the type having been 

 designated as Limnophila pictipennis by Westwood in 1840. No species 

 of this subgenus have yet been described from North America. 



The larva of L. punctata (Meig.) was described by Beling (1886:195- 

 197) and by Gerbig (1913:158-161) as living in wet earth, by Scheffer 

 (1848: 10) and by Cameron (1917:63) as living in decaying wood. Gerbig 

 found larvae in sandy soil near both standing and flowing water. The 

 larvae are very active, are rust-brown in color, and attain a length of 15 

 millimeters with a diameter of from 1.5 to 2 millimeters. The body is 

 provided with several setae and setiferous projections. The spiracular 

 disk (Plate XL VI, 214) is surrounded by four subequal lobes and an addi- 

 tional reduced dorso-median lobe; all of these lobes are fringed with long 



