540 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. The}' are also parasitized by Bassus Icetatoriiis. 



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 

 ohliqiia as scarcely to permit of separate description. The pupa- 

 rium is generally less strongly elevated posteriorly, (See Fig. 7Sc/, 

 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 Rume.x crispus, vSandusky, 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. (wSee Fig. 71). 



c^. Length, 6 to 8 mm. Face and front light yellow, 

 shining; tubercle and anterior oral margin somewhat fuscous. 

 Antennre 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; pleura 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 seginent narrowly brown or blackish in front and 

 behind, elsewhere reddish yellow; fourth segment yellow and ob- 

 sciu-ely 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. 



