; 
REPORT OF THE STATE ENTOMOLOGIST 1907 323 
LASIOPTERA Meig. 
Members of this entire group are usually easily recognized by 
| the thickly scaled costa, subcosta and third vein, the two latter 
being clese to the anterior margin of the wing and the last named 
usually uniting therewith near the middle. It and allied genera have 
a characteristic coloration, usually being thickly clothed with dark 
brown scales and in many species the dorsum of the abdomen is 
conspicuously ornamented with silvery white markings, the latter 
being either in the form of a margin along the anterior or posterior 
edge of the abdominal segments or in a series of submedian spots 
resting upon the posterior margin of the segments. The members 
| of this genus present a wide range in the number of antennal seg- 
ments, those of the female varying from 16 in the case of L. 
mila Vescemsto 22 inlk. querrcitlorae. @he segments of 
the male antennae vary from 16 in L. lycopi to 21 or 22 in 
the maleof L. desmodii. Some species have the same number 
of antennal segments in both sexes, while in the majority the female 
_ possesses two to four or five more than her consort. There seems 
to be no law governing this variation. Certain of the females pos- 
sess a peculiar group of heavy, stout, recurved, chitinous hooks on 
the dorsum of the lobes of the ovipositor. This peculiar structure 
is present in several rather widely separated forms. ‘ 
The species belonging to this genus breed for the most part in 
more or less irregular subcortical galls on the stems of both herba- 
ceous and woody plants. An interesting form, L. caulicola, 
has been reared from apparently normal Diervilla stems. All 
species of this genus appear to winter in their galls. Those which 
live in herbaceous stems emerge, as a rule, in early spring, while 
the forms subsisting upon woody stems are more likely to fly during 
June. A few species breed in leaf galls; for instance, L. corni 
in an ocellate, highly colored, blisterlike gall on the leaves of 
CORMUS aAlternaizOlias Ib, WitkiS iaTAS wae Commarea 
tumid leaf or tendril gall on grape, while L. impatientifolia 
produces a somewhat similar gall on the under side of the leaf of 
the snapdragon (Impatiens fulva). Blackberry leaves fre- 
quently have near the base a hard, corky, warty gall caused by 
lb, LALIMOSa, ILASl@MPrera “x.Cavalea ies a mao 
singular habit, since the larvae occur in a true leaf mine in the 
foliage of Crataegus. The galls may be monothalamous or poly- 
thalamous, some of the latter being inhabited by a considerable 
number of larvae, as in the case of L. cylindrigallae and 
log EO Mm Lea. 
