. Bulletin - New York State Museum. Science. 22 Lasioptera vitis, ventral aspect of larval head, much enlarged (Original). appearance to this organ. Chitinous fork or " breastbone " stout, slightly expanded posteriorly, widely produced anteriorly in two conspicuous lateral processes and with a pair of large, well separated anterior teeth. •Terminal segment about one half the width of the body, distinctly produced posteri- orly and bisected ventrally by the slitlike anal orifice. Grape gall fly (L a s i o p- t er a V it i s (O. S.). The Fig large, irregular, reddish mass of tissue pro
. Bulletin - New York State Museum. Science. 22 Lasioptera vitis, ventral aspect of larval head, much enlarged (Original). appearance to this organ. Chitinous fork or " breastbone " stout, slightly expanded posteriorly, widely produced anteriorly in two conspicuous lateral processes and with a pair of large, well separated anterior teeth. •Terminal segment about one half the width of the body, distinctly produced posteri- orly and bisected ventrally by the slitlike anal orifice. Grape gall fly (L a s i o p- t er a V it i s (O. S.). The Fig large, irregular, reddish mass of tissue produced by this insect has been repeatedly described, while so far as known the larva has not been characterized, though it is an exceedingly peculiar form. Larva. The full grown larva is about 3 mm long, yellowish in color and rather slender. Head some- what retracted, short, tapering rapidly to a nearly truncate anterior margin. Antennae short, stout, basal segment stout, about two thirds as long as broad, apical segment about as long as broad, gently rounded apically and apparently excavated ventrally, there being two broad, ventral, flaplike appendages with gently rounded margins. Chitinous fork or " breast- bone " very short, its posterior portion being indis- tinct, anterior portion broad, stout and with a pair of Fig. 23 La^siop- large, acute, cephalic teeth. Body with many trans- breastbone, much verse wrinkles, posterior extremity with a simple anal (Ongi- g|-^ ^^^^ ^-^j^ ^ pg^jj. ^£ rather prominent submedian pseudopods arising from tuberculelike elevations, the terminal portion of these appendages somewhat fusiform. Anterior of the pseudopods there is a median, large, subtriangular elevation bearing numerous minute tuberculate processes. Willow potato gall (Rhabdo- phaga bata- tus Walsh). Very irregular, gouty, polythalamous en- largements occur on the shoots of Fig. 24 low swamp wil- lows. Specimens taken at Karner April 13, 1903, produced adults the 27th
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