LIBRARY

782
COLLEGE ENTOMOLOGY
3. Rat-tailed or Eristalis, cylindrical; slender or robust; posterior respiratory
tube retractile and may be from one to three or more times as long as the body
(in Myiatropafiorea Linn., 12-15 mm. long, of Europe, the tube is 12 times the
length of the body, 9 or 10 in. long); with circlet of long hairs at the apex;
pseudopods on most of the body segments. Feeding in liquid vegetable extracts
1st longitudinal vein
2nd longitudinal vein
3rd longitudinal vein
anal cross vein
FIG. 287. Wings of the large syrphid fly, Sciliva pyrastri (Linn.). The false 01' spurious vein is
important in recognizing the flies belonging to the family SYRPHIDlE.
and filth. Represented by the genera Cheilasia Panzer, EristaUs Latr., and
Eumeros Meig. (Heliophilus Meig,),l
4, Aphidivorous or Syrplws, elongated, somewhat flattened, pointed anteriorlY
and truncate posteriorly; posterior spiracular tubes reduced; short, soft,
pointed, lateral body tubercles often present; green, brown, gray, or mottled.
Predacious on aphids and coccids. Representatives in many genera include
Allograpta O.S., Baccha Fab., Melanostoma Schiner. Paragus Latr., Pipiza
Fallen, Scmva Fab .• and Syrp hus Fab.
The pup