Wings are shorter than normal, reaching to about the tip of the abdomen, and are frequently incompletely expanded or misheld. The head and thorax are disproportionately small compared to the abdomen, which is normal or slightly distended. Males are inviable, short lived and usually sterile.
RK3. Head and thorax disproportionately small compared to abdomen. Wings short, reaching only to tip of abdomen; frequently incompletely expanded or misheld. Male shows reduced viability and usually sterile.