ETHEL BROWNE HARVEY 
Sex chromosomes in insects 
re C GROUP FAMILY EXCEPTIONS 
X | Orthoptera Acrididae 
Blattidae 
Gryllidae Gryllotalpa; XY 
Locustidae 
Phasmidae 
Forficulidae? 
X | Hemiptera Aphidae 
homoptera | Cercopidae 
Fulgoridae 
Jassidae 
Membracidae | Enchenopa bi- 
nottata (X or 
XVI) 
X | Hemiptera Coreidae Some Metapo- 
heteroptera | Hydrometridae dius (XY) 
Pyrrochoridae 
X | Coleoptera Elateridae 
Lampyridae 
XY | Diptera 
| | | 
XY | Hemiptera 
heteroptera 
One Carabidae 
Some Chryso- 
melidae 
One Silphidae 
Anthomyidae 
Asilidae 
Bombyliidae 
Culicidae 
Drosophilidae 
Muscidae 
Sarcophagidae 
Statiomyidae 
Syrphidae 
Belostomidae 
Galgulidae 
Lygaeidae 
Nabidae 
Nepidae 
Notonectidae 
Pentatomidae 
Reduviidae 
Oedancala (X) 
Ist 
Ist 
Ist 
EXCEPTIONS 
Enchenopa bi- 
nottata (X, 
2nd; or XY, 
1st?) 
Archimerus (1st) 
Photinus, 2 sp. 
(2nd) 
Tingis (Tingiti- 
dae) (1st) 
