498 PROCEEDINGS OF THE ACADEMY OF [Sept., 



Tipula rangiferina sp. n. 



Coloration yellowish brown; antennal flagellum unicolorous ; 

 thorax without distinct stripes; lateral margin of the abdominal 

 tergites with five brown spots; male genitalia with the ninth tergite 

 broadly concave behind, the lateral angles produced into prominent 

 blunt horns which suggest the budding horns of a stag. 



Male. — Length, 13 mm.; wing, 13.5 mm. 



Female. — Length, 16 mm.; wing, 14.7 mm. 



Frontal prolongation of the head moderate in length, light brown, 

 the nasus prominent; palpi 'light brown. Antennae with the three 

 basal segments dull brownish yellow, the remainder of the flagellum 

 almost black, each segment with a basal swelling, the segments 

 with a whitish pubescence. Head dark gray. 



Pronotum and the dorsum of the mesonotum light brown, without 

 distinct darker markings. Pleura pale brownish yellow. Halteres 

 long, rather slender, the stem pale, the knob brown. Legs with the 

 coxse yellowish; the trochanters brownish yellow; femora yellowish 

 brown, the tip dark brown; tibiae brownish yellow, the tip narrowly 

 dark brown; tarsi brown. Wings light grayish; stigma distinct, 

 light brown; a broad vitreous band before the stigma extending 

 into cell Mt; a very small vitreous spot beyond the stigma in the 

 base of cell R2; veins brown. Venation as in Plate XVII, fig. 17. 



Abdominal tergites brownish yellow, a little darker dorsally, 

 each segment with the caudal margin silvery; tergite two with a 

 large rounded spot on the side at about midlength; tergites three 

 to six with this spot basal, conspicuous; apical tergites brownish, 

 the hypopygium more reddish; sternites dull brownish yellow; the 

 sclerites are provided with numerous scattered black hairs. Male 

 genitalia (see Plate XVIII, fig. 38) with the eighth tergite broad, 

 distinct for its entire width. Ninth tergite (see Plate XIX, fig. 55) 

 extensive, the caudal margin deeply and broadly concave; the 

 lateral angles produced into a blunt lobe whose tip is provided with 

 four or five blunt tubercles which suggest the budding horns of a 

 stag; the dorso-median area is broadly membranaceous. Ninth 

 pleurite complete, but very small and restricted, consisting of a 

 small oval lobe on the caudal face of the sternite; this sclerite is 

 produced caudad into a flattened oblong point which bears on the 

 inner face near the tip a sharp, triangular, chitinized tooth, directed 

 inward and caudad; the outer face of this pleural projection is 

 provided with from fifteen to eighteen coarse hairs; the pleural 

 appendage (see Plate XX, fig. 70) is a conspicuous lobe, the anterior 



