THE CANADIAN ENTOMOLOGIST 149 



the wing-root: ventral posterior margin, immediately dorsad of the base of the 

 halteres conspicuously dark brown. Pleura yellow, a pale brown cloud on the 

 dorsal marj; ii of the mesosternum and another on the caudal margin of the 

 mesepimeron. Halteres with the base and knobs conspicuously light yellow 

 the remainder of the stem dark brown. Legs with the coxae yellow, the outer 

 face of the posterior coxre infumed; trochanters yellow; femora yellow, the tips 

 broadly (1.8 mm.) and abruptly blackened; tibiae brownish yellow, the tips 

 rather narrowly dark brown; tarsi brown, darker distally. Wings with a faint 

 brownish tinge, cell 5r more brownish yellow; stigma brown; a brown spot at 

 the arculus; brown seams along the cord, outer and anterior margin of cell 1st 

 il'/o; obliterative areas beyond arculus and before the stigma; veins dark brown. 

 Wnation: similar to T. pomposa but veins Rs and R^+z in alignment; Rs shorter 

 than i?2+3; vein R-i bent a little toward i?4+5 (as in T. alphas pis) ; cell 1st M^ very 

 large, roughly rounded-oval in outline; fusion of M^ and Citi extensive, longer 

 than the basal deflection of ilfs. 



Abdomen with the basal tergites obscure yellowish, beyond the second 

 more brownish; lateral margins of the segments narrowly light yellow; a broad, 

 dark brown, submarginal stripe; sternites more uniformly reddish yellow. 

 Ovipositor with the tergal valves \'ery long and slender, straight, divergent; 

 sternal \al\es ending about opposite mid-length of the tergal valves, compressed. 



Habitat. — Southern Rhodesia. 



HoIotype—9, Mt. Chirinda. Melsetter District, altitude 3,800 feet, June 

 11, 1911. (C. F. M. Swynnerton). 



Presented b\' the Entomological Research Committee 1912-145. 



Type in the collection of the British Museum (Natural History). 



Tipiila silinda is somewhat similar to T. pomposa Bergroth but is very 

 distinct in the details of coloration and structures. It is closer to T. jocosa Alex- 

 ander (Cape Colon\ — Natal) and T. masai, sp. n. (British East Africa) as 

 discussed under this latter species. The specific name, silinda, is the Zulu 

 form of Chirinda, for the explanation of which I am indebted to Dr. G. A. K. 

 Marshall. 



Tipula masai, sp. n. 



Allied to T. jocosa; antenna? yellow; wings grayish subhyaline, variegated 

 with brown seams and hyaline spaces in certain of the cells. 



Female. — Wing 18 mm. Middle leg, femur 9.5 mm. ; tibia 10.5 mm. Hind 

 leg, femur 10 mm.; tibia 12.1 mm. 



Frontal prolongation of the head rather slender, brownish yellow, paler 

 ventrally, with a narrow, brown, lateral line; mouth-parts yellowish; palpi 

 dark brown. Antenna? light yellow, only the distal segments darker coloured. 

 Head reddish brown. 



Pronotum light brown. Mesonotal pra?scutum obscure yellow with four 

 narrow, light yellow stripes that are narrowly margined with dark brown so as 

 to practically obliterate the ground colour; intermediate stripes bent away from 

 one another near mid-length, exposing a linear strip of the ground colour; 

 anterior and lateral margins of the pra?scutum dark brown ; scutum yellow, the 

 lobes indistinctly margined anteriorly with brown, the posterior half broadly 

 and conspicuously margined with brown, this colour bridging the posterior half 



