464 FAMILY XV. — TINGIDIDjE. 



Compositse, Baccharis halimifolia L. Described from Paradise 

 Key and Miami, Fla., from specimens taken on Baccharis and 

 probably confined to that genus of plants, four of which occur 

 in the State. 



420 ( — ). Corythuca ulmi Osborn & Drake, 1916, 231. 



Oblong, subquadrate. Body black; last two ventrals brown; an- 

 tenna? and legs dull yellow; nervures mostly pale brown; spots on para- 

 nota very small or obsolete; pronotum brown, its posterior third paler; 

 elytra with a vague brown basal cross bar. Hood less than twice as 

 high as median carina, less than twice as long as high, its apical half 

 strongly compressed, and cells more than twice as large as those of pai-a- 

 nota. Costal margins of elytra feebly concave. Length, 3.3 mm. 



Charleston, S. Car., Aug. 14 (Gerhard). Described from Lis- 

 bon, Ohio. Known also from Connecticut, Maryland, Virginia, 

 New York and South Dakota. Occurs on elm, Ulmus americana 

 L., and probably of wide distribution. 



421 (639). Corythuca arcuata (Say), 1832, 27; I, 350. 



Oblong or subquadrate. Body black; legs and antenna? dull yellow, 

 the fourth antennal and tips of tarsi brownish; nervures above creamy- 

 white or yellowish, those on hood often darker, cells hyaline; pronotum 



brown, paler at tip; cross-bars of elytra 

 dark brown, front one interrupted, the 

 apical one irregular, often obscure, its 

 central portion largely hyaline. Hood 

 low, over twice as long as high, compressed 

 at middle, the globose hind portion subde- 

 pressed above and with large cells. Me- 

 dian carina arched in front and with two 

 rows of areolae. Length, 3 — 3.3 mm. (Fig. 

 103). 



Common throughout Indiana, 

 more so in the southern counties. 

 Fig. io3, k li. (After uhier). Found at all sea sons, hibernating be- 

 neath bark and fallen leaves and occurring in summer mainly 

 on white and chestnut oaks, often doing much injury to the 

 foliage. Ranges from Quebec and New England west to North 

 Dakota and Colorado and southwest to Alabama and Texas. 

 Not as yet recorded from Florida, but probably occurs in the 

 northern counties. Uhler (1884, 284) mentions it as "occur- 

 ring, sometimes in great numbers, on the leaves of several 

 kinds of oaks, occupying the under side of the leaves, like all 

 its congeners, laying its eggs next the midrib and veins, and 



