Marshall. — On Neiv Zealand Diptera. 235 



short pedicels, cylindrical. Wings either unspotted or 

 variegated. 



A. Second Longitudinal Vein reaching tlie ]\Iargiii of the Wing at or 



before the Apex. 



1. Flagellar joints of the antennae alternately singly and 

 doubly jointed. 



a. Wings unspotted. 



Diplosis duhia, n. sp. (Plate V., fig. 3.) . Female. An- 

 tennae, 0033 ; expanse of Nsing, 0-060 x 0-024 ; body, 

 0-036 X 0-010. Antennae dark -brown, the two basal joints 

 of the flagellum being longer than the others; all the joints 

 cylindrical, the pedicels being half the length of the joints ; 

 verticils small. Front part of thorax black, becoming ferru- 

 ginous-brown posteriorly. Scutellum ferruginous. Halteres 

 white ; pedicels long, with rather small pyriform clubs, 

 clothed, like the pedicels, with scattered black hairs. Ab- 

 domen ferruginous -brown, with a few hairs giving silvery 

 reflections. Legs long, clothed with black hairs giving silvery 

 refiections ; femora longer than the tibiae ; first joint of 

 tarsus very short, second joint four or five times the length 

 of the first, third about one-third the length of the second, 

 fourth and fifth slightly shorter than the third. Wings with 

 yellowish tinge, very small hairs. Veins yellowish ; first 

 longitudinal one- third length of the wing, close to costa ; 

 second longitudinal joining margin just before the apex ; 

 transverse vein joins first longitudinal at two-thirds of its 

 length from the base. 



I have only one specimen, taken at Lincoln, October. 



Diplosis difficilis, n. sp. Male. Length of antennae, 

 0064 ; expanse of wings, 0-055 x 0019 ; body, 0031 x 0-005. 

 Antennae brownish, with modei'ately-long black verticils; 

 double joints about the same length as their pedicels, but 

 single joints considerably shorter ; last joint ending in an 

 appendage about as long as its pedicel. Head black, smooth. 

 Thorax yellowish-brown, darker anteriorly ; a patch of black 

 curved hairs on each shoulder, but otherwise surface of thorax 

 smooth. Scutellum light yellowish-brown, smooth. Halteres 

 with long pedicels ending in a comparatively small club ; 

 dirty-white in colour, clothed sparingly with black hairs. 

 Abdomen yellowish-brown ; posterior part of the segments 

 darker, clothed with black hairs, giving silver reflections. 

 Legs about three times the length of the body, slender, light- 

 yellow, but appearing nearly black from the large number of 

 black hairs situated on them ; tibiae slightly swollen at the 

 tip. Wings hyaline, with slight yellowish tinge. Veins 

 brownish ; first longitudinal ending a little before half the 

 distance along the costa ; second longitudinal reaching the 



