54° 
The Ohio Naturalist. 
[Vol. XII, No. 8, 
As in Allograpta obliqua these larvae are colored like the leaves 
on which they commonly feed and this is probably of some protec- 
tion to them. They are also parasitized by Bassus ledatorius. 
Pupa. 
Dimensions, average of six: Length, neglecting the posterior 
respiratory appendage, 5.3 mm., height 2.05 mm., width 2.1 mm. 
In general shape, color, and appearance so similar to Allograpta 
obliqua as scarcely to permit of separate description. The pupa- 
rium is generally less strongly elevated posteriorly, (See Fig. 78c/, 
Fig. 70.) The characters of the posterior respiratory appendages 
however remain as in the larva and will always serve to distinguish 
the species from A. obliqua. 
Pupation was observed to occur in an open greenhouse Colum- 
bus, Ohio, June 5, 1911. On Rumex crispus, Sandusky, the 23rd 
of June and later, and from the middle of September to the middle 
of October on cabbage. The pupae were glued to the more or less 
exposed surfaces of the leaves among which the larvae had fed. 
The duration in the pupal stage (indoors) was 5 to 7 days. 
Adult. 
The following description modified after Williston, Synop. 
N. A. Syrph. applies to the adults reared from the larvae and pupae 
described above. (See Fig. 71). 
dC Length, 6 to 8 mm. Face and front light yellow, 
shining; tubercle and anterior oral margin somewhat fuscous. 
An ten me reddish yellow, sometimes brownish above on third 
joint. Dorsum of thorax dark greenish olivaceous, somewhat 
shining, with an abbreviated lateral stripe reaching only to the 
suture, or very indistinct back of the suture; two more or less 
prominent grayish pollinose stripes on the anterior part near the 
middle line; pleurae deep shining, somewhat bluish black, with 
light yellow spots as follows : a large one under the base of the wing, 
irregular in shape, imperfectly divided, covering the pteropleura 
and parts of the mesopleura and metapleura; and three smaller 
ones, one above the base of each coxa; which, except the front one, 
may be continuous with the larger spot ; scutellum sulphur yellow. 
Abdomen slender; first segment black except on the sides; second 
segment with a broad yellow cross-band in the middle, and a brown 
or black band half its width in front and behind, not reaching the 
lateral margin. Remaining abdominal segments more or less 
variable; third segment narrowly brown or blackish in front and 
behind, elsewhere reddish yellow; fourth segment yellow and ob- 
scurely brownish; fifth segment and hypopygium wholly reddish 
yellow, the latter globose and with a tuft of pile below in front. 
Legs yellow including the coxae, the tarsi more or less infuscated. 
Wings nearly hyaline, not exceeding the abdomen. 
