BY FREDERICK A. A. SKUSE, 
1127 
not elongated. Inner marginal cell not dilated. Anterior branch 
of the second longitudinal vein always present, very small, situated 
very near the marginal cross-vein, consequently the marginal cell 
is very small. Anterior branch of the fourth longitudinal vein 
issuing from the fourth longitudinal vein beyond, at, or before the 
middle of it, rarely near the root of it. Fifth longitudinal vein 
incomplete. Three ocelli on the front. 
Section III. — Second longitudinal vein, marginal cross- vein, fifth 
longitudinal vein and inner marginal cell as in the second section. 
Anterior branch of the second longitudinal vein always missing, 
therefore only two sub-marginal cells. Anterior branch of the 
fourth longitudinal vein arising from the fourth longitudinal vein 
V>eyond. at, or before the middle of it, rarely missing, more rarely 
still the anterior branch of the third longitudinal vein missing. 
Clcelli three or only two, namely ; — 
A. Three on the front. 
B. Three, one on the inner margin of each of the compound 
eyes, the third always very small, situated in the 
rniddJe of the anterior margin of the front. 
C. Tvxj, one on the inner margin of each of the compound 
eyes. 
SUMMARY OF THE GENERA.^ 
SECTION I. 
Sub-Section I.— DIADOCIDIN^. 
Genus 1. Diadocidia, Ruthe. 
Anterior branch of the second longitudinal vein mi.ssing. 
Anterior branch of the fourth longitudinal vein and the third 
longitudinal vein issuing from the second longitudinal vein. 
Fifth longitudinal vein perfect. Inner marginal cell moderately 
dilated, very short. Surface of the wings liairy. 
• Omitting EudicruiM, AUocolocera, Monoclona a,nd Par exechia, known to 
rne hy name only 
