50 AN ACCOUNT OF BRITISH FLIES. 
He makes three genera in A; viz., (i.) Cecidomyia, (ii.) Spaniocera, 
and (iii.) Lasioptera. The first he divides into several sub-genera. 
(i.) Cectdomyia.* 
Antenne long and moniliform, or cylindrical; generally verti- 
cillate, 13-36 joints. Wings always very hairy, and have densely 
pubescent margins. Three or four longitudinal veins. There are 
two types of wings. In the first type the third vein is forked, thus 
representing the third and fourth veins, which have united for most 
of their length. In some rare cases this fork may become obliter- 
ated. In the second type cf wing the four veins are separate and 
simple. We must note in these insects a curious longitudinal fold 
between the second and third longitudinal veins, present in most 
Cecidomyide. 
(ii.) Spaniocera, Wtz. = Brachyneura, Rd. 
Antenne filiform, having no verticils, and composed of thirteen 
joints. Wings covered by scaly hairs. There are three longitudinal 
simple veins, the first running parallel to and close to the costa. 
The other two widely separate (Fig. 94). 
(iii.) Lastoptera, Mg. = Lastopteryx, Steph. 
Antennz composed of 16-26 joints, each joint being sub-globular, 
with short verticils. The three longitudinal veins not so easily seen 
as in the above genus; the first and second run close together, and 
near the costa. There is a large space between the second and third 
vein (Fig. 10A). Proboscis short. 
The following is a short description of the sub-genera of Cec#- 
domyia : 
Cecidomyia, Lw. = { Dasperaee use 
| Rhabdophaga, Westw. 
Same number of joints in the ¢@ antenna asin the ¢. The joints 
may be pedicelled or sessile. ‘The second longitudinal vein reaches 
the margin of the wing before its tip (Fig. 14). 
Phytophaga, Rd. 
Bremia, Rd. 
The antenna of ¢ =26 to 27 joints; that of the 9 =14 to 15. 
The joints are pedicelled. The second longitudinal vein reaches 
the margin beyond the tip. The joints of the antennz of the g 
double the number of those of 2 (Fig. 2a). 
* As far as I can make out, there seems to be a great division of opinion as to 
what the genus Ceczdomyza is to mean; Meigen, Latreille, Macquart, Zetterstedt, 
and Walker, holding one opinion; Loew, Rondani, Westwood, Winnertz, 
O.-Sacken and Schiner, another. Taschenberg describes the genus as having sub- 
costal and cubital veins plainly separable ; postical vein forked. 
Diplosis, Lw. = 
