1915.] NATURAL SCIENCES OF PHILADELPHIA. 495 



Habitat. — Eastern United States. 



Holotype, cf, Glencarlyn, Fairfax Co., Va., June 21 (Knab). 



Paratype, cf , District of Columbia (Osten Sacken). 



The type is in the collection of the United States National Museum, 

 the paratype in the Museum of Comparative Zoology. The latter 

 specimen is part of the Loew collection and bears the manuscript 

 name "hamata" in Loew's writing; to the specimen Osten Sacken 

 has added the follomng label: "Notice the small forceps below the 

 large one. " 



The specific name adopted is that of the Indian tribe of the same 

 title. 

 Tipula Seminole sp. n. 



Coloration j-ellowish, antennae rather incUstinctly bicolorous; 

 thorax brownish yellow ^^'ithout distinct stripes in alcohol; wings 

 pale yellow or brow^iish yellow, the costal area and the stigma 

 darker. iVIale genitalia with the ninth tergite square, with a deep 

 rectangular notch, the lateral lobes rounded. 



Male. — Length, 12.5 mm.; wing, 12.6 mm.; antennse about 

 4.6 mm. 



Female. — Length, 23.5 mm.; wing, 15.8 mm. 



Frontal prolongation of the head rather long, moderately slender, 

 dull 3'ellow, the palpi browTiish yellow. Antennse rather short, 

 the first three segments yellow or yellowish, remainder of the antennse 

 with the basal enlargement dark brown, the remainder of each seg- 

 ment brownish yellow, this color darker on the terminal segments 

 so that the color at this point is more unicolorous. 



Thoracic dorsum brownish yellow -without distinct stripes (in 

 alcohol). Pleura dull yellow, indistinctly marked with brown. 

 Halteres rather pale throughout. Legs -^dth the coxse and tro- 

 chanters dull yellow, the femora similar, a little darkened at the tip; 

 tibiae and tarsi yello^vish bro\\ii. Wings pale yellow or brownish 

 yellow, the costal cell and the stigma more saturated, the latter 

 rather indistinct; a vitreous mark before the stigma extending into 

 cell 1st M-i; veins brown. Venation as in Plate XVI, fig. 16. 



Abdomen light yellow with a bro"s\Ti subbasal spot on the sides 

 of the tergites, most distinct on segments two to five. Hypopygium 

 of the male (see Plate XVIII, fig. 37) having the ninth tergite (see 

 Plate XIX, fig. 54) square or nearly so, with a deep rectangular 

 median notch on the caudal margin, the adjacent lobes obtusely 

 rounded. Ninth sternite in contact with the ninth tergite, the 

 pleurite complete or nearly so, the pleural suture being better indi- 



