102 THE GENUS CORYTHUCHA 



equal. Hood flattened somewhat on top. Globose portion of hood slightly 

 wider than long. Hood prominently constricted. Reticulations of hood 

 large, larger than those of paranota. Median carina arched, with at least one 

 large areole next to base of hood, usually with two rows. Lateral carina short 

 and terminating a considerable distance from base of hood, withareoles clouded. 

 Elytra about as wide at apex as at anterior line of eljlira, costal borders straight. 

 Spines along costal border of elytra, border of paranota and at apex of hood 

 small, not numerous. Length 3.1 mm., width 1.6 mm. 



General dorsal aspect varies from whitish to yellowish and fuscous. Nerv- 

 ures usually yellowish. Antennae and legs yellowish. Hood more or less 

 embrowned. Paranota sometimes unmarked, usually with a brown spot 

 placed anteriorly, sometimes a faint brown spot posteriorly. Brown band at 

 base of el^lra and an irregular brown band across apex of elj'tra sometimes 

 entirely obsolete. 



This species has had the manuscript names of T. querci of 

 Riley and betulae of Heidemann. 



It occurs over the entire United States east of the Rockj- Moun- 

 tains. Oak is its native food plant. Innumerable specimens 

 have been studied. 



52. Corythucha ciliata Say 



1832. Tingis cilinta Say, Hem. New Harm., p. 27. 

 1903. Corythucha ciliata Morrill, Psyche, x, p. 133. 



Pronotal hood only slightly higher than median carina, flattened on top 

 and posteriorly. Height of hood less than one-half its length. Length of 

 hood and median carina about equal, median carina sometimes appears 

 slightly longer. Hood not prominently constricted, reticulations even and 

 not large, about same size as those of paranota. Median carina with two rows 

 of areoles. Lateral carinae large and high, with areoles, but terminating a 

 considerable distance from base of hood. Costal margins of elytra nearly 

 straight. Spines on borders of paranota and elytra and on nervures of hood 

 small. Length 3.75 mm., width 1.6 mm. 



Dorsal aspect whitish or hyaline, only browTi markings being a spot on each 

 tumid elevation of elytra. 



This has long been known as the Sycamore Tingid and is known 

 to occur on it wherever sycamore grows, east of the Rocky Moun- 

 tains. 



53. Corythucha confraterna new species 



Pronotal hood slightly higher than median carina. Height of hood less 

 than one-half its own length, length shorter than median carina. Median 

 carina long with two rows of areoles. Lateral carinae high and rather long. 

 Reticulations of hood distinctly larger than those of paranota. Spines on 



