Hutton. — On New Diptera. ISO 



with a long petiole ; the posterior cross-vein not in a line 

 with the chief cross-vein. Proboscis about four times the 

 length of the head ; palpi about two and a half times its 

 length ; the last joint swollen, shorter than the penultimate. 

 Antennae rather shorter than the proboscis. Length, 5 mm. ; 

 wing, 5 mm. 



Eab. Wellington (G. V. Hudson). 



The short legs, long proboscis, and hairy veins make 

 this species look very like a mosquito. 



Genus Trochobola, Osten-Sacken, 1868. 



Trochobola dohrni. 



T. dohrni, Osten-Sacken, Berlin, ent. Zeitschr., xxxix., p. 264 

 (1894). T. ampla, Hutton, Trans. N.Z. Inst., vol. xxxii., 

 p. 36 (1900). T. fumipennis, Hudson, Man. N.Z. Ent., 

 p. 48 (1892), no description. 



I unfortunately overlooked this species and the next when 

 writing my paper on the Tijmlidce. The following is Osten- 

 Sacken's description : — 



"Head, rostrum, palpi, and antennae brown, the latter 

 sometimes reddish on the second joint. The proximal part 

 of the flagellum is almost moniiiform, the joints 1 to 4 

 somewhat urn-shaped, with a little brush of microscopic hairs 

 on one side and some scattered longer hairs on the other ; the 

 rest of the flagellum has more elongate joints, with scattered 

 short hairs. Thorax brown or reddish-brown, with four dark- 

 brown stripes and a covering of yellowish sericeous pollen. 

 Abdomen reddish-brown, with somewhat darker lateral margins. 

 Legs rather long, yellowish-brown, with a distinct dark-brown 

 space just before the tip of the femora, and a narrower yellow 

 ring immediately proximal of the brown ; knees paler. Hal- 

 teres wdth a brown knob. Wings nearly the same as in annu- 

 lata and argvs, but the proximal two-tbirdsof the second basal 

 cell are filled out, or nearly so, with brown. There is a large 

 brown spot in the region of the stigma, between the third vein 

 and the costa ; within it there is a small yellowish spot on 

 the costa, a little beyond the tip of the auxiliary vein, and a 

 round hyaline spot in the proximal end of the submarginal 

 cell ; along the apex the distal end of the submarginal and 

 first posterior cells has a dark-brown irregular margin. Male 

 forceps (very much shrunken in drying) has apparently the 

 same structure as that of the European T. annulata. Length, 

 from 12 mm. to 16 mm. ; length of the wing, from 13 mm. to 

 23 mm. 



" Hab. Five males and one female from Professor Hutton, 

 in Christchurch, and Helms, in Greymouth. The first speci- 



