88 AN ACCOUNT OF BRITISH FLIES. 
L. carnea, H. Lw.= Cectdogona carnea. 
This species has white halteres ; antennz black. Wings with pale 
veins ; black near costa. Abdomen of ¥ testaceous, also legs (in 
both sexes); tarsi brown. Habits and metamorphosis likewise 
unknown. PI. ii. (9). 
A third speciés is recorded in Verrall’s list as British, viz., Z. cinerea, 
Meg., and also described in Walker and Blanchard.* Bergenstamm 
and Low say it is synonymous with Z. /eucophea, Mg. 
Genus.—Lasioptera. 
The insects in this genus are distinct from the ones we have been 
discussing. ‘There are three longitudinal veins, although this is not 
easily seen at first; the first being very faint and running with the 
second close to the costa. Pl. i. (10). The wings are short and 
broad. Antennz 16-26-jointed ; the joints are sessile and sub-globular. 
Proboscis very short. They are small and delicate insects. Ocelli 
-absent. Eyes lunate. Tarsi very long ; metatarsus often very short. 
In their habits they resemble the Cecidomyzda, infesting plants 
much in the same way. The larve are much the same as in the 
Cecids, having the same peculiar reddish hue and curious “ breast- 
bone.” 
Clinorhyncha is considered by some as a sub-genus of Lasioptera, 
by others as a distinct genus, the chief difference from Lastoptera 
being the prolongation of the mouth into a rostrum. This sub-genus 
is not recorded from England, however. | 
There only appear to be two verified British species of Zasioptera ; 
three others recorded in Verrall’s list seem to be doubtful, and there 
are also two reputed forms. 
* L. pitta, Mg. 
L. rubi, Schrk. et Heeger.t = 4 Z. argyrosticta, Mg. 
L. fusca, V allot. 
The larvee live in excrescences on the stems of various Audi and 
metamorphose in the galls. They appear in May. 
Jmago.—Brownish-black ; antennz of ¢ black, shorter than the 
head, 20-21-jointed. Palpi yellow; head yellow and brown. 
Thorax deep black ; “schildchen” white. Abdomen and ¢ genitalia 
covered by white hairs. Legs also covered by silvery hairs. Wings 
clear ; costa thick and dark, in the middle a white spot, root of costa 
* Histoire Naturelle des Insectes, iii., 1840, p. 574. 
t Lin. Ent., vol. viii., p. 306., pl. iv., figs. 11 and 14. 
