374 



PAT'KRS. 



Cerotrioza (Psyllidae, Homoptera). 



BY I). I.. t'RA\Vl'(ii;i). 



Ill a previous paper on Hawaiian J'syllidae^ the genus 

 Cerotrioza was erected for one species apparently native on the 

 island of Oahn. There were referred to this same genus two 

 species from the South Pacific whici seemed to be related to 

 the Hawaiian species. Examination of additional specimens 

 representing the same as well as new species both from Hawaii 

 and the Sonth Pacific has convinced me that a change mnst he 

 made in this genus. 



Cerotrioza should be a little more restricted to include two 



Plawaiian species (one new and described below), while the 



South Pacific species should be referred to the genus Lewonota 



Crawford- alread}^ established and embracing several species 



from various parts of the world. 



CEROTRIOZA redefined — Vertex as long as broad or longer, pro- 

 duced in front into two rounded epiphyses extending over and often 

 t-e3rond insertion of antennae ; genae slight!}'- swollen around insertion of 

 antennae but not produced into conical processes. Remainder of original 

 definition valid. 



This genus in Hawaii is apparently a derivative of some species of 

 Leuroiiota, for the two genera are similar in tlie elongate, unarched 

 body and elongate wings witli similar venation but differ in the structure 

 of the head : — 



Cerotrioza — Genal cones wanting ; vertex longer than broad or at 

 least as long as broad, produced in front into two large epiphj^ses. 

 Lcnroiiota — Genal cones present, porrect, half or fully as long as ver- 

 tex ; vertex not as long as broad, sometimes produced into two 

 ^mall epiphyses close to front ocellus. 



The following species have been or are now referred to the 



gen u s Le ? / ron o tii : — 



L. nuiculata Crawford^ — S(»urli western United States. 



L. acutiprnrris Crawford''" — Nicaragua. 



L. longipenuis Crawford'"' — Florida. 



1 Proc. Haw'n. Ent. Soc. Ill, No. 5, p. 4.")4, April, 1918. 



2 United States Nat. IMus. Bui. 85:67, 1914, 



^ United States Nat. Mus. Bui. 85 :67-70, 1914. 



Proc. Haw. Entom. Soc. TV". No. 2. Tune. 1920. 



