lo FAUNA HAWAIIENSIS 



% (? same species). Long. corp. 4 mm. ; al. 6 mm. Similar to Z- but smaller, 

 abdomen without the pale lateral margins, legs less conspicuously hairy, hairs decumbent, 

 wings clearer. 



This species appears to be closely allied to T. anomala O.-Sack., but may be 

 distinguished therefrom by the absence of the pale hind margins of the abdominal 

 segments. 



Hab. Hawaii, one male, Olaa, December 1896; one female, Kaawaloa, 1500 ft., 

 June 1892. 



Styringomyia Loew. 



The specimen described below is perhaps the most interesting Dipteron in the 

 whole collection. The genus was originally founded upon specimens preserved in 

 copal, and a second species has been found in amber. In 1872 Baron C. R. Osten- 

 Sacken discovered that the genus was represented in South Africa by an existing 

 species, which however he did not describe. 



( I ) Styringomyia didynm, sp. nov. 



%. Long. Corp. 5^ mm. ; al. 4 mm. Antennae yellow, ist joint twice the length of 

 the second, light yellow above, infuscated at the sides, 2nd joint fuscous, palpi yellowish, 

 darker at the tip. Thora.x reddish-brown, with a large sub-triangular light yellow spot 

 on each side immediately behind the suture and merging into the light yellow colour of 

 the pleurae ; halteres light yellow. Abdomen long and slender, light yellow, each seg- 

 ment with a pair of hemispherical dark brown spots near the posterior margin, on the 

 1st segment almost covering the whole of the dorsum, on the succeeding four segments 

 smaller, on the 6th again larger, on the 7th more elongated, and almost coalescing with 

 a central dark stripe which reaches the anterior margin. Hind legs (the only ones 

 present in the specimen here described) stout, yellow, femora long-haired with two 

 brown spots on the upper surface at a distance respectively of one-third and two-thirds 

 from the base, tibiae slightly darker at the tip, thickly clothed with short hairs and 

 furnished on their outer sides with a row of regularly disposed long bristles, tarsi hairy 

 with the last joint dark brown. Wings yellowish-hyaline, veins pale, anterior transverse 

 vein conspicuously infuscated, fork of anterior branch of the 4th vein and the posterior 

 transverse vein slightly so, auxiliary vein difficult to distinguish from the first longitudinal 

 vein owing to the Hexure of the wing, terminating opposite the origin of the 2nd longi- 

 tudinal vein, terminal section of the 2nd longitudinal vein straight, abruptly bending 

 towards the costa, which it joins opposite the posterior transverse vein, 7th vein distinctly 

 curved at the tip, terminating opposite the origin of the 2nd longitudinal vein. 



Hab. Oahu, one female, Honolulu, November 1896. 



Plate I. hg.s. 14 — 16, head, abdomen, wing. 



