374 



Cerotrioza (Psyllidae, Homoptera). 



BY I). L. CRAWFOIM). 



In a previous paper on Hawaiian Psyllidae^ the genus 

 Cerotrioza was ei'ected for one species apparently native on the 

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

 species from the South Pacific whicL 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 South Pacific has convinced me that a change must be 

 made in this genus. 



Cerotrioza should be a little more restricted to include two 

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

 South Pacific species should be referred to the genus Leuronota 

 Crawford- already established and embracing several species 

 from various parts of the world. 



CEROTRIOZA rcdeiincd — Vertex as long as l)road or longer, pro- 

 duced in front into two rounded epiphyses extending over and often 

 beyond insertion of antennae ; genae slightly 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 

 Leuronota, for the two genera are similar in the elongate, unarched 

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

 of the head : — 



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

 least as long as broad, produced in front into two large epiphyses. 



Leuronota — C'.enal cones present, porrect, half or fully as long as ver- 

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

 small epiphyses close to front ocellus. 



The following species have been or are now referred to the 



genus Leuronota : — 



L. maeulaia Crawford^ — Southwestern United States. 



L. acutipennis Crawford" — Xicaragna. 



L. longipennis Crawford"'^Florida. 



1 Proc. Haw'n. Ent. Soc. Ill, No. .5, p. 4.54. April, 1918. 



2 United States Nat. Mus. Bui. 8.5:67, 1914, 



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



Proc. Haw. Entom. Soc, IV, No. 2. June, 1920. 



