Dec. 1896.j Linell: On North American Chrysomelas. 
197 
free spot; the fourth strongly abbreviated, with a free spot at the middle 
of the sides. (Southern States to Mont, and Ariz. 
Z. exclamationis Fabricius. 
Oval, brown, smaller; elytra pale, with sutural and subsutural vittse confluent, 
the second and third joining at two-thirds the length, a free spot near 
apex and a very short fourth vitta behind the humerus; epipleura pale. 
(Kans., Neb., Mont., Dak.)-. Z. conjuncta Rogers. 
Like previous form but generally paler In color and the elytral vittse broken up 
into spots. (Kans., Dak., Mont.). Z. var pallida Bland. 
Oval, brown, of medium size; elytra pale with brown vittse, the subsutural united 
with the sutural; two broad discal vittse generally connected near apex 
the fourth vitta entirely wanting; epipleura and the margin posteriorly 
brown. (Ariz., N. Mex., Colo., Utah). Z. continua Leconte. 
(syn. fasciatipennis Jacoby.) 
Thorax unicolorous, brown or seneous. 
Globosely oval, brown, slightly bronzed ; elytra pale with dark vittae ; subsut¬ 
ural united with sutural, two confluent discal vittse, no isolated spots. 
epipleura pale with dark margins. (East of Rocky Mts.). 
Z. sutural is Fabricius. 
Like previous form, but the subsutural and discal vittse free, var. casta Rogers* 
Globosely oval, brown, slightly bronzed; elytra pale with narrow vittse; the 
subsutural free, slightly abbreviated; the second and third sinuous, ab¬ 
breviated and united at two-thirds the length; the fourth very short, 
confluent at base with the third ; two or three isolated spots posteriorly; 
epipleura pale with brown margins. (Tex., Kans., Ariz.) 
Z. disrupta Rogers. 
Like previous form, but smaller and still more globose; the second vitta twice 
interrupted, the fourth represented by a spot only. (Tex., Col.) 
Z. heterothecae sp. nov.* 
Oval, dark seneous ; elytra pale with a sinuous vitta extending from the humerus 
to near the suture one-fourth from apex, thickened at middle, hooklike at 
apex and with a short humeral stripe attached to its base; an oval spot 
near the scutellum and three smaller ones posteriorly near the lateral mar- 
gin; sutural vitta striatopunctate, trifid at base; epipleura and margin 
pale. (Tex.; Southern Ariz., Mex.). Z. malvze Stair 
Oval, ferruginous; elytra yellow with markings as in Z. malvce, but subsutural 
vitta free for at least half the length and the epipleura margined with 
brown. (Ariz., N. Mex.). Z. tortuosa Rogers 
Oval, brown, more or less bronzed; elytra pale with a broad sutural vitta, rami¬ 
fied before and behind the middle, a broad arcuate band from the 
* Chrysomela festiva Fabricius. “ Nigrosenea, elytris lineis tribus suturaque 
antica flavis. Statura C. fastuosce at duplo minor. Habitat America.” Suffrian 
suggests that this may be identical with casta Rogers, but I can not see that the 
description fits this or any other North American species. 
\ Mr. E. A. Schwarz informs me that he collected this species in abundance at 
Columbus, Texas, feeding on the leaves of the Composite plant, Ideterolheca scabra. 
