53» 
The Ohio Naturalist. 
[Vol. XII, No. 8, 
Syphaerophoria cylindrica (Say). 
(Plate XXX, Figs. 71-78). 
Egg- 
Length 0.9 mm., diameter 0.3 mm. Elongate oval, less 
pointed anteriorly than that of Allograpta obliqua but scarcely 
discernible from the latter, or from egg of Syrphus americanus, 
except possibly by microscopic examination. 
Color chalk-white, sculpturing very similar to that of Allo- 
grapta obliqua. The projecting bodies however, appear, on the 
whole, to be shorter and broader than in that species, about two 
or three times as long as broad; distance between any two bodies 
about one-half the width of the body itself ; number of arms around 
it 12 to 20, rather short, not much branched. Many of them 
ending at half the distance across the intervening space. Numbers 
of bodies around the egg at the middle about 50 ; number the length 
of the egg from pole to pole, very close to 30. 
A female of this species taken on May 8, 1911, over grass, was 
confined and fed sweetened water. Four days later, May 12, 22 
eggs were laid, and two the following day. None of these eggs 
hatched up to May 22, and were probably infertile, though it is 
possible that other conditions might have prevented normal 
development. Another female taken on May 13 laid only 2 eggs 
May 14; and a third, after being enclosed for some days, oviposited 
several dozen eggs on May 31 . None of these hatched. 
The eggs were deposited in the usual manner, the posterior 
ventral portion being glued to the surface. These little glistening 
white eggs seem to have no method of natural protection except the 
egg-shell which is leathery rather than fragile. 
Larva. 
Length 9 to 10 mm., height 1.25 mm., width 2.25 mm. Elongate 
oval, tapering at anterior end, somewhat truncate except for 
respiratory appendage at posterior end, depressed. Outline irreg- 
ular, dorsal integument much wrinkled transversely, and with 
lateral, longitudinal carinse. (Fig. 76). 
Color pea-green with two, narrow, longitudinal, white stripes, 
laterad of and paralleling the rather conspicuous dark heart line. 
These white stripes and other coloring produced as in Allograpta; 
the stripes attenuated and confluent a little before the anterior end, 
not reaching the respiratory appendage posteriorly. 
Respiratory appendage brownish black at the tip. The skin 
is papillose, bare except for the usual segmental bristles which are 
here short, light-colored and inconspicuous. There are a number 
