154 MISCELLANEOUS STUDIES 



APPENDIX 1 

 KEYS TO THE GENERA AND TRIBES OF APHIDIDAE 



BY 

 P. VAN DEE GOOT, 1913 



Subfamily APHIDINAE 



1. Antennae seven-jointed (better six-jointed). The last true joint with a dis- 



tinct, more delicate continuation (terminal process). This continuation 

 almost as long as, or even much longer than the last segment; if shorter, 

 the cauda is distinctly wart-shaped, and the number of rudimentary gona- 

 pophyses is always two. Cornicles almost always well formed and clearly 

 projecting. Wings with twice-branched cubitus, only once-branched in 

 exceptional cases 2 



Antennae mostly six-jointed, the last joint with a short projection, this being 



usually distinctly shorter than half the last segment. Cornicles scarcely 

 projecting, very often only appearing as pores or entirely absent. Wings 

 with a simple or once-branched cubitus 5 



2. Cauda wart-like, occasionally not so, or scarcely separated, but then the number 



of rudimentary gonapophyses is always distinctly two 3 



Cauda sickle-shaped or knobbed, not wart-like, only very seldom absent. Rudi- 



mentary gonapophyses always three Siphonophorina 



3. Cornicles very long, almost cylindrical. Rudimentary gonapophyses three. 



Drepanosiphina 



Cornicles very short, somewhat clubbed. Rudimentary gonapophyses two or 



four 4 



4. Number of rudimentary gonapophyses four. Body never with long clubbed 



hairs Chaitophorina 



Number of rudimentary gonapophyses two. Body often with knobbed hairs. 



Tarsi always with two pulvillae [Haftlappchen] Callipterina 



5. Cauda wart-like 6 



Cauda not wart-like, usually absent 7 



6. Anal plate bilobed. Sensoria of alate females linear Hormaphidlna 



Anal plate simple. Sensoria of alate females circular Vacunina p.p. 



7. Cauda distinctly sickle-shaped Mindarina 



Cauda only scarcely or not at all separated 8 



8. Antennae five-jointed. Cornicles very short, only slightly projecting. Body 



without distinct wax gland groups Vacunina p.p. 



Antennae six-jointed, those of the apterous forms often only four- or five- 



jointed. Cornicles often only pores or entirely lacking. Body often with 

 wax gland 9 



9. Body with long, mostly fine hairs; without distinctly facetted wax gland 



plates. Primary sensoria almost always, without hairy edges 10 



Body naked; very often with distinctly facetted wax-gland plates. Primary 



sensoria often with hairy edges 11 



10. Rudimentary gonapophyses three. Wings mostly with twice-branched cubitus. 

 Cornicles always prominent Lachnina 



Rudimentary gonapophyses none. Wings with simple or once-branched cubitus. 



Cornicles often absent ... ....Anoeciina 



