﻿—35— 

 NEW CALIFORNIA HOMOPTERA. 



BY E. P. VANDUZEE. 



To the kindness of Mr. D. W. Coquillett, of Los Angeles, 

 Cal, I am indebted for the opportunity of studying a very inter- 

 esting series of Homoptera from the West coast. This collection 

 has proved of great interest, not alone on account of the large num- 

 ber of new species it contains, but principally, perhaps, for the 

 clearer light it throws on the relationship existing both between the 

 American Hcmopterous fauna and that of Europe, and between the 

 several members of our own Eastern fauna. A number of the new 

 species here made known, falling into the older gepera, seem to 

 connect these with other genera, or to show a type of variation 

 before unknown in this country. Thus Thamnotettix subcenea x&- 

 minds us, especially by its ornamentation, of Scaphoideus. T. 

 coquilletti, in the same respect, recalls Calliscarta. T. geminata 

 in most of its characters would be taken for a Cicadula, while T. 

 limbata represents, possibly, a new generic type, related to Tham- 

 notettLx, as is the European Anoterostemma to Athysamcs. Delto- 

 ■cephalus coqidlletti might readily be mistaken for an Athysanus and 

 Pediopsis nubila for an Agallia. In Jassus ladipennis we have, 

 perhaps, the smallest species of the true Jassids yet known, and 

 very probably the type of a new genus of this interesting group, 

 which includes such genera as Jass7is Fab. (Stal.), Teridia Stal., 

 Petahpoda Span., Palicus Stal., etc. AUygus i?iscriphis deserves 

 notice as being the only North American species, at least as far as 

 known to me, that falls exactly within the limits of the genus as 

 characterized by Dr. Fieber. 



Aside from the species described below, this collection contains 

 fourteen forms of the Typhlocybidtz that I have not yet studied; 

 three or four species the descriptions of which have been reserved 

 for publication with related material from the East, which I hope 

 will soon appear; a few forms that require the study of more exten- 

 sive material before they can be satisfactorily characterized, and 

 eleven that I have been able to identify with already described 

 species. 



Species absolutely identical with European forms are remark 

 ably few in this collection, — only two have thus far been recognize' 

 and form a proportionately smaller element than in our East 

 fauna. But there are many species closely related to their Europ 

 congeners, and it is not unlikely that, with a full series of the 

 fornian Jassidce, a very observable correspondence with th 



