A BRIEF REVIEW OF THE I3KITISH CONIOPTERYGID.'E. 243 



External lobe of maxilla 3-jointetl ; 5-6 pairs of 

 small ventral " sacs," on abdominal segments 



1-6 ... ... ... ... ... ALEUROl'TERyGIN.E. 



Sub-family— CONIOPTERYGIN.E. 



Tribe — Conwentziini, Enderlein. 



Easily recognised by the very small hindwings with strongly 

 reduced venation (tig. 1). Contains only the one genus. 



Conwentzia, Enderlein. 



1. Colour lighter, anteun^B 38-43 jointed; nervules 

 of forewing between sub-costa and radius and 

 radius and radial-ramus apart, the latter striking 



the upper arm ('o t 3) of fork ... C. iisurifunnis, Curtis. 



Colour darker, antennsB 28-34 jointed ... 2. 



2. Nervules above-named touching, running in one 



line and striking at the fork-point or the upper 

 arm just above it (fig. 2). Light or semitrans- 

 parent, elongated patches in distal cells marked 

 1, 2 and 3(lig. 3). Pound on sallow. C. cii//>l<»i('nriK, Bagnall. 



3. Nervules apart, the latter striking the stem of the 

 fork (fig. 2). Forewings apparently without 

 transparent patches in the distal cells. Found 



on larch. ... ... ... ... C. innetivula, Enderlein. 



Tribe — Coniopterygini, Enderlein. 

 Hind wings normal. 



Table of Genera. 



1. Media in hindwing forked (figs. 7-8).... ... 2 



Media in hindwing not forked, simple (fig. 6). 



CONIOPTERYX, S.S. 



2. Nervule connecting the fore-cubitus (<'((j^) and 



the media [tu) in fore- and hindwings striking 

 the latter on the lower arm (»//^) of fork (tigs. 7 

 and 8) ... ... ... ... Semidalis, Enderlein. 



8. Above-named nerviile in both wings striking the 

 media on the stem of fork below the fork-point 

 (lig. 9). Species dark ... ... Pakasemidalis, Enderlein. 



Genus — Coniopteryx, Curtis. 



1. Size smaller (scarcely more than 5mm. across the 



wing), antenuiu shorter and less than one-half 

 the length of forewing, stouter; nervules between 

 the sub-costa and radius and radius and radial- 

 ramus touching or almost touching in both fore- 

 and hindwings (fig. 5) ; marginal setse of wings 

 more minute and sparse ... ... C. iii/ifinacns, Enderlein, 



2. Size larger (6mm. to 7"0mm. across wings) ; 

 antennse longer and more slender, 25 to 26 (rarely 

 more) jointed. Above-name 1 nervules well 



