NEMATOCERA. 83 
HT, millefolii, Lw. = C. achillee, Inchbald. 
The larve inhabit calyx-shaped galls in the axils of the leaves of 
Achillea millefolium. 
Besides these there are four other British species, viz. : 
Ff. abrotani, Traill. 
H. corni, Gir., the larve in galls on Cornus sanguinea. Vide Kalten- 
bach (18), p. 295. 
HT. Fischeri, Fefld., form swellings on the stems of Carex pilosa. 
Vide (18), p. 730. 
, The . larve 
live in spindle- 
shaped galls on 
‘ Tipula juniperina, Linné. the upper twigs 
Cecid. ms Deg. of the juniper, 
HI, juniperina, 1. = + Oligostrophus juniperina, Lat. Jand metamor 
Lasioptera Pe Mg. |phose in the 
| Cecid flavimaculata, Zett. galls. Vide 
Bremi (1),  p. 
24, and Schiner 
(7); P: 399. 
Sus-GENus.—Dirrhiza, Lw. 
Schiner unites Dirrhiza, Lw., with Zfidosis, from which it only 
differs in this: that the transverse veinlet is plain, and the antennze 
in ? sessile, and in ¢ only short petioles. 
D. rhodophila, Hardy. 
This small sub-genus is represented in England by one species 
only, viz., D. rhodophila, described by Hardy.* Bergenstamm says, 
“Lebenweise unbekannt.” Found only in England; another 
species /aferita is found in Europe, habits likewise unknown. 
2 Jmago.—Pale; small; elegant; head black; thorax brown 
above, with three lines of “ griscous” hairs ; scutellum and meta- 
thorax yellow or pinkish; abdomen short, light yellow ; legs long 
and slender, yellowish. Wings wide, with purple iridescence, finely 
pubescent and fringed. Costal and first longitudinal vein distinct. 
Antennz black, 18-jointed ; first and second joints thick and cup- 
shaped, gradually getting smaller, last joint ovate, short verticillate 
hairs. Halteres white. Length } lin. 
Sup-GENuS.—Zpidosis, Lw. 
Walker describes several of this sub-genus, but they are not now 
* Ann. of Nat. Hist., vi. 182 (Larvae possibly form galls on.the rose). 
6—2 
