108 ^Ir. F. W. Edwards on 



conspicuous by being clotbed with long yellowish hair, the 

 middle part of the sternite convex. Ninth tergite with a 

 rather small median projection, which is bifid and covered 

 apically with small black spines. Legs blackisli, femora 

 ochreous towards the base. Wings with a conspicuous 

 pattern (see PI. X. fig. 19). Halteres ochreous-brown, knob 

 mostly pale yellowish. 



Length of body 14 mm. ; wing 18 mm. 



Formosa : Musha, 10. v. 1917 [T. Shiraki), 1 ^ . 



Evidently nearly allied to 7'. marinoratipevnis, Brun., 

 T. serricornis, Alex., and other species of the same large and 

 rather difficult group. The wing-markings are extremely 

 similar to those of the two species named, but ilie hypo- 

 pygium differs. 



Tipula biserra, sp. n. (PI. X. fig. 18.) 



Head ochreous, a roughly diamond-shaped dark mark on 

 the vertex, continned forwards almost to base of antennae; 

 sides of rostrum somewhat darkened. Palpi blackish, the 

 tips of the joints light brown. Antennae ochreous, flagellar 

 joints slightly enlarged and tlistinctly blackened at the base ; 

 verticils a little longer than the joints. First flagellar joint 

 a little shorter than the first scapal ; second and third 

 flagellar joints distinctly shorter than the first and fourth ; 

 last joint minute. Tliorax dull greyish brown, the pra3- 

 scutum with three dark brown stripes, which have slightly 

 darker edges, the median stripe divided by an indistinct pale 

 line. Scutellum and postnotum with a dark brown median 

 line, not very conspicuous. Pubescence short and incon- 

 spicuous. Abdomen elongate, ociireous-brown, with con- 

 tinuous median and lateral dark brown longitudinal stripes. 

 Ninth tergite long, almost equal to the long anal valves of 

 the ovipositor; these latter almost straight, Avith two keels 

 on the outer face, both of which are conspicuously serrate, 

 the inner face hairy. Genital valves very short, not reach- 

 ing base of anal valves. Legs dark brown ; femora somewhat 

 lighter, with black apical rings. Wings as in PI. X. fig. 18 ; 

 note particularly the uniformly brown apex, and the shape of 

 the pale markings in the lower basal cell. Halteres blackisli ; 

 base of stem ochreous, tip of knob yellowish. 



Length of body 23 mm. ; wing 20 mm. 



Formosa : Arisan, 24. iv. 1917 {T. Shiraki), 1 ? . 



Though this species is also obviously related to T. serri- 

 cauda, Alex., and T. serridens, Alex., the resemblance is not 



