June, 1917] American Tingidce 303 



brownish, a few sj^ots fuscous. Antennae testaceous, the distal portion 

 of the fourth segment fuscous. Legs testaceous, the tips of tarsi 

 darker. All spines testaceous, \\dth tips black. Body beneath black. 



Described from a good series of specimens, taken on ''Erio- 

 dictyon californicum/' both adults and nymphs at "San Fran- 

 cisquito Cr., San Mateo Co., Cal.," by G. F. Ferris. This 

 insect has long spines like hispida Uhler, but it can readily be 

 separated from it by the smaller hood, smaller size, and the 

 slightly shorter spines. 



Corythucha fuscigera 



Our specimens of this species are from Mexico. It is 

 probably found in the southern part of the United States, but 

 the specimens that we have examined labeled fuscigera have 

 proved to be of five or six different species. The figure in the 

 Biologia Centrali-Americana is an excellent drawing of the 

 species. 



Corythucha pruni Osborn and Drake. 



This species which w^as described from a series of specimens 

 from Washington, D. C, has not been noted in other collections. 

 The hood in this species is much smaller than in either of the 

 other two species that infests wdld cherry. 



Corythucha padi Drake. 



This Tingid infests choke cherry, Prunus demissa, in the 

 western states. We have specimens from Montana, Oregon, 

 Washington and Chilliwack, British Columbia. The three 

 cherr}' Tingids, C. pruni, C. padi, and C. associata, are very 

 distinct from each other, the size and shape of the hood being 

 the outstanding difference. In pruni the hood is small and 

 not highly elevated ; in associata the hood is highly elevated, very 

 large, very abruptly constricted near the middle, and globose 

 behind; in padi the hood is between the other two in size and 

 nearly semiglobose behind. This is a good illustration of the 

 number of Tingids that may feed on allied food plants, and, 

 although it is very desirable to know the plant or plants that a 

 species infests, it is not safe to assume that one has the species 

 known to occur on a given plant simply because it has been 

 found feeding or breeding on these plants. Associata is more 

 closely allied to acsculi than to either of the two cherry Tingids. 



