NEMATOCERA. 39 
‘Cecidomyzide, Hal. 
Tipularice Gallicole, Meig. 
Tue Crectpomyipé& = 4 Cecidomynz, Rond. 
Cecidomiites, Newm. 
\Cecidomyzides, Zett. 
Fic. 6.—Catacha latipes. A, Ungues and pulvillus of C. /atzpes. 
This is one of the most important families of the Nematocera,* 
and contains a very large number of extremely minute insects, 
characterized by the following points: “ Eyes lunate, ocelli very often 
absent. Antenne moniliform, composed of thirteen joints in 2, 24 
in ¢, at least, and ornamented with short verticillate hairs. Very © 
few veins are present in the wings, which are often hairy. Thorax 
devoid of transverse sutures. Legs long, coxz short, femora elon- 
gated and thin, tibize destitute of spurs.” 
Taschenberg | describes the Cecids generally as follows : 
Extraordinarily small. Colours change in death. Head com- 
paratively large, proboscis short, palpi generally four-jointed ; rather 
large eyes, generally bare, ocelli absent in most species. Antennz 
long, often very long, globular or cylindrical, depressed or stalked, 
articulations varying in number according to thesex. Thorax arched, 
scutellum small. Abdomen cylindrical, eight-ringed. Legs very slender, 
tibiz without spurs, tarsi small, with one pulvillus (Fig. 6, A). 
Wings large, broad, rounded in front, decreasing at the root, edged 
with hairs, often hairy at the surface. The radial, discoidal, and anal 
veins are wanting, so that there are only three to five veins. Sub- 
* This family is included by Osten-Sacken in his 7rue Mematocera. 
+ Taschenberg’s ‘‘ Praktische Insekten-Kunde,” 1880, 
