1920] Alexander: Crane Flies From Formosa 251 



narrow, dark brown lateral stripe on either side. Ovipositor as in the 

 genus, the tergal valves comparatively small and strongly upcurved, the 

 longer sternal valves almost straight, but slender. 

 Female. Length 12.8 mm.; wing, 17.8 mm. 



Allotype, 9 , Arisan, Formosa, June 22, 1917. 



Limnobia Meigen. 

 Limnobia atridorsum sp. n. 



General coloration of the mesonotum shiny black; pleura yellowish, 

 marked with black; wings brownish yellow, the cord indistinctly seamed 

 with darker; abdominal tergites dark brown, sternites yellow, ringed 

 caudally with dark brown. 



Female — Length 9 mm.; wing, 9.1 mm. 



Rostrum black, moderately elongated; palpi black. Antennae 

 of moderate length, the first scapal segment brownish black; second 

 segment pyriform, yellowish; first flagellar segment obscure yellow 

 basally, remainder of the flagellum black; flagellar segments cylindrical, 

 with long, black verticils. Head strongly narrowed behind the eyes, 

 shiny brownish black, the front and anterior part of the vertex gray 

 pruinose; a median furrow on the occiput and posterior part of the 

 vertex. 



Pronotum black medially. Mesonotal praescutum shiny black, the 

 humeral region conspicuously obscure yellowish; remainder of the 

 mesonotum shiny black. Propleura orange-yellow; mesepisternum and 

 mesosternum black; remainder of the pleura greenish yellow, with a 

 rounded dark brown spot on the lateral sclerites of the postnotum 

 immediately before the root of the halter. Halteres pale brown, the 

 knobs dark brown. Legs with the fore coxae and trochanters orange- 

 yellow; remaining coxae and the trochanters greenish yellow; rest of 

 the legs broken. Wings brownish yellow; stigma dark brown; cord and 

 outer end of cell 1st M2 narrowly and indistinctly seamed with brown; 

 wing-tip indistinctly darkened; veins dark brown. Venation: Sc long, 

 Sc-i at the tip of Sci and at least four times as long as Sc\ alone, about 

 equal to r; Rs moderately long, angulated and slightly spurred at 

 origin; r removed from the tip of Ri to a distance between one and one- 

 half to two times its own length; cell 1st M-i closed, basal deflection of 

 Ch\ just beyond the fork of M; the costa continues around the wing- 

 margin as a delicate vein. 



Abdominal tergites dark brown; sternites yellow, the posterior 

 margins of the segments narrowly ringed with dark brown, these bands 

 increasing in size to the apical segments, on the sub-terminal segments 

 including the entire sternite. Ovipositor with the tergal valves long, 

 straight, acute; sternal valves shorter. 



Habitat: Formosa. Holotype, 9 , Funkiko, April 25, 1917 

 (T. Shiraki) No. 1335. 



