NO. 2344. ^VVERFAMILY TIFU LOi DE A—ALEXANDER AND McATEE. 395 



Tribe TIPULINI. 



KEY TO GEXEK.\. 



1. Abdomen greatly elongated in both sexes, much longer than the wing; 



antennae very small; male hypopygium of simple structure, the pleural 



appendages lying in the dorsal cavity of the ninth sternopleurite 2. 



Abdomen not greatly elongated in the male, very rarely so in the female 

 (Tipula lonyivcntris) male hypopygium otherwise 3. 



2. Cell M. sessile, wings strongly suffu.sed with reddish-brown 



Aeshnasoma (p. 395). 

 Cell M, .short-petiolate ; grayish, the subcostal cell hvoww—Longurio (p. 395). 



3. Rs usually very .short, almost transverse, simulating a crossveiu ; cell M i 



sessile or short-petiolate; basal deflection of Cui or m-cu joining M at or 



before the fork; coloration usually yellow and black, shiny 



Ncphrotoina (p. 395). 

 Rs usually longer, n(jt appearing like a crossvein ; cell M i always petiolate ; 

 basal deflection of Cui or m-cu joining M at its fork or, usually, under- 

 neath cell first if-.; coloration usually dull brown, yellow, or gray 



Tipula (p. 398). 

 Genus LONGURIO Loew. 



LONGURIO TESTACEUS Loew. 



Virginia near Plimimers Island, June 24, 1908, H. S. Barber ; Cabin 

 John Bridge, May 31, 1900 (pupal skin). This is the largest species 

 of crane-fly in eastern North America, and in the female sex even 

 exceeds the better known, Holofusia ruhiginosa of the western States. 

 The immature stages live in sandy soil along the margins of streams. 



Genus AESHNASOMA Johnson. 



AESHNASOMA RIVERTONENSIS Johnson. 



Maywood, Virginia, July 10, 1919, at light, McAtee; previously 

 known only from New Jersey. 



Genus NEPHROTOMA Meigen. 



KKY TO SPECIES. 



1. Thoracic stripes black or blackish 2. 



Thoracic stripes, if present, brownish or reddish 3. 



2. Autennal flagellum uniformly black ; tip of wings and stigma darkened, 



the latter dark brown ; velvety black marks at the ends of the V-shaped 

 suture and the lateral praescutal stripes small, not close together; post- 



notum with a brown median line N. incurva (p. 397). 



Antennal flagellum with the basal segments bicolorous; tip of the wings 

 not darkened ; stigma pale brown ; velvety black marks at the ends of 

 the V-shaped suture very extensive, so the pale yellow lateral margin 



of the sclerite is restricted ; postnotum yellow, unmarked 



N. virescens (p. 397). 



3. Thoracic dorsum dull, opaque 4. 



Thoracic dorsum shiny; if at all opaque, the antennae of both sexes very 



short (tenuis group) 6. 



4. Antennae of the male elongate, more than half the length of the body, the 



flagellum black N. macrocera (p. 397). 



Antennae short In both sexes, the flagellar segments indistinctly pale 

 at base 5. 



