EDMUND H. GIBSOX 85 



Five paratypes from Columbus, Ohio, in the Drake collection, 

 and numerous other specimens from Ohio have been examined. 

 Hackberry is given bj- Osborn and Drake as the food plant of 

 this species. 



16. Corythucha piercei new species 



Very .similar to cellidis Osborn and Drake, but differing from it in having 

 the l)rown spot on the paranota distinctly larger and darker and the hood more 

 extensively embrowned. The median carina in piercei is also slightly more 

 arched. 



Pronotal hood slightly higher than median carina, with its height at least 

 one-half its own length. Hood and median carina equal in length. Reticu- 

 lations of hood slightly more than twice the size of those of the paranota. 

 Lateral carinae of medium height and short. Spines on membranous margins 

 and nervures numerous and moderately long. Costal margins of elytra nearly 

 straight. Membranous portions hyaline, nervures slighth' yellowish. Hood 

 more or less heavily embrowned on top. A large brown spot on anterior 

 portion of paranota. Elytra with distinct basal and apical bands. Apical 

 band not entirely brown, with manj^ partially hj'aline areoles. Size, 3.7 mm. 

 long, 2 mm. wide. 



Type. — 9, WilHams, Arizona. (Dr. W. D. Pierce.) (Collec- 

 tion of United States National Museum.) Allotype. — cT, same 

 data as type. Paratypes. — One female and three males, same 

 data as type. 



The species is named in honor of Dr. W. D. Pierce, who col- 

 lected all stages of the species from Quercus species, during August, 

 1917. 



17. Corythucha salicis Osborn and Drake 



1917. Corythucha mlicis Osborn and Drake, Ohio Jr. Sci., xvii, no. 8, p. 298. 



Pronotal hood high, but not twice as high as median carina and distinctly 

 longer than median carina. Height of hood at least one-half its own length. 

 Median carina rather low, not ai-ched. Lateral carina short. Spines on mem- 

 branous margins. Reticulations of hood larger than those of paranota. Size, 

 3.5 mm. long, 1.9 mm. wide. 



Membranous portions whitish-hyaline marked with dark brown. Hood 

 more or less embrowned. A rather faint spot on paranota. Elytra with 

 brown bands across base and apex. Apical band only on costal half. 



Separalile from inolUculata in its smaller si/e and hood a 

 little more abruptly constricted. These two species may prove 

 to be the same, Init until more specimens can be provided and 

 examined from the type locality of moUiculata , and that species 

 more definitely determined, it is well to keep tliem distinct. 



TRANS. AM. ENT. SOC, XLIV. 



