Descriptive Features: apterous or macropterous (very rarely)
body elongate oval, 2.0-2.9X greatest width across mesothorax, dark coloured or with yellowish and reddish-brown pattern, pilosity dense but mostly short
antennae slender, long, ½ - 2/3X body length, segment 1 distinctly longer than head and other segments, segments 2 and 3 subequal in length, segment 4 shortest
pronotum (apterous) long, covering all but a narrow band of mesonotum, yellowish with two large dark markings in middle
pronotum (macropterous) large, pentagonal, with raised humeral angles
fore wings uniformly dark
fore femur simple
midleg long, femur about 1/3X body length, mid tarsus long, subequal in length to tibia, with short segment 1 and much longer segments 2 and 3, segment 3 about 1.2X segment 2, split for about 3/4 of its length, with elaborate swimming fan of about 20 plumose, hair-like branches, claws modified, flattened, blade-like
hind femur much thicker than mid femur (especially in male), ventrally with 1 or more large teeth and numerous smaller teeth and spinules
abdomen relatively long, sides almost straight or more or less rounded
connexiva broad, obliquely raised or sometimes vertical in posterior parts in female
male grasping comb of fore tibia short, ~ 1/5X tibia length, abdominal venter not modified, genital segments conspicuous but simple, parameres large, falciform with blunt apices
female with posterior margin of sternum 7 straight, exposing parts of gonocoxae from beneath, proctiger broad, protruding or slightly deflected
Total length: (m) 4.0 -4.2 mm, (f) 4.0 – 4.4 mm |
|
Rhagovelia australica |
|
|
