96 THE GENUS CORYTHUCHA 



of Heidemann's. It occurs throughout the southwest portion of 

 the United States and Mexico, where it is one of the commonest 

 species of the genus. It is to be found on various cultivated 

 plants and weeds. 



39. Corythucha decens Stil 



1835. Tingis gossypii Burmeister (not of Fabricius), Handb. der Ent., ii, 



p. 259. 

 1862. Tingis decens Stil, Stett. Ent. Zeit., p. 324. 



Hood at least twice as high as median carina, which is extremely short, being 

 not more than one-quarter of the length of hood. Hood constricted before the 

 middle, apex quite acute, globose portion large. Height of hood fully one- 

 half the length of hood. Reticulations of hood much larger than those of 

 paranota. Lateral carinae minute, nearly obsolete. Costal margins of elytra 

 more or less concave. Spines on membranous margins and nervures numerous. 

 Size, 3 mm. long, 1.7 mm. wide. 



General color aspect yellow. Nervures of hood more or less embrowned. 

 Small brown spot on paranota. Brown band across base of elytra and another 

 across apex. Basal band sometimes confined to anterior-lateral angle of 

 elytra. Apical band wide, about one-third the length of elytra, not closed 

 anteriorly, with large hyaline areoles. A brown spot at center of costal margin 

 of elj'tra. 



The only specimens which I have seen are from Paraiso, Pan- 

 ama Canal Zone, and were collected by Mr. E. A. Schwarz in 

 1911. Champion, in the Biologia Centrali-Americana, lists its 

 occurrence in North America, Mexico, Central America and 

 West Indies. Food plant unknown. 



This species can readily be separated from all others by the 

 extremely short median carina and nearly obsolete lateral carinae. 

 These points are well illustrated in the Biologia Centrali-Ameri- 

 cana. 



40. Corythucha gossypii Fabricius 



1794. Acanthia gossypii Fabricius, Ent. Syst., iv, p. 78. 

 1803. Tingis gossypii Fabricius, Syst. Rhyng., p. 126. 

 1868. Galeatus gossypii St&l, Hem. Fabr., i, p. 93. 

 1873. Corythucha gossypii St§,l, Enum., iii, p. 123. 



Pronotal hood as high as or slightly lower than median carina, its height 

 equal to one-half its length. Length of hood considerably less than length of 

 median carina. Hood constricted at the middle but not prominently so, and 

 not noticeably on top or posteriorly. Globose portion of the hood wider than 

 long. Reticulations of hood small. Median carina arched with at least two 

 rows of areoles. Lateral carinae small, terminating a considerable distance 



