158 MISCELLANEOUS STUDIES 



Group LACHNINA 



1. Wings usually with twice-branched cubitus, the radius always straight. Cauda 



not at all or only slightly separated Lachnus 111. 



Type Lachnus juniperi De Geer. 



Wings with once- or twice-branchel cubitus and with a curved radius ; the mem- 



brane usually with dusky markings. Cauda usually slightly separated 2 



2. Beak distinctly longer than the body, strongly retractile. Cubitus but once- 



branched, the wings only slightly darkened Stomapnis Buckton 



Type Stomaphis quercus (Linn.). 



Beak clearly shorter than body and only slightly retractile. Wings beautifully 



spotted with dark brown 3 



3. Cubitus twice-branched Dryobius Koch 



Type Dryobius croaticus Koch. 



Cubitus once-branched Schizodryobius n.gn. 



Type Lachnus exsiccator Hart. 



Tribe ANOECIINA 



1. Hind tarsi elongate Trama Heyden 



Type Trama radicis Koch. 



Hind tarsi not elongate 2 



2. Cubitus once-branched. Cornicles present, quite prominent. Margin of body 



with peculiar non-faceted "wax-gland" (?) plates Anoecia Koch 



Type Anoecia corni (Fabr.). 



Cubitus not branched. Cornicles absent. Wax gland plates not present. 



Tullgrenia v. d. G. 

 Type Tullgrenia phaseoli (Pass.). 



Tribe HOEMAPHIDINA 



1. Antennae always five-segmented. The fronds almost without exception with 



two little horns. Cubitus once branched Cerataphis Licht. 



Type C. lataniae Boisd. 



Antennae of the apterae often only three-segmented. Fronds without protuber- 



ances. Cubitus simple Hamamelistes Schim. 



Type H. betulae Mordw. 



