48 TRANS. S. D. Society NATURAL HISTORY 
surface, the elytral nervures are almost entirely pale to the base 
of the apical areoles. This form has been taken only on the low 
ground near the coast at National City in June. 
This species as a whole has the elytra wider than in blaisdelli 
with the costa quite distinctly bent at about the middle. It is a pow- 
erful flyer and makes a loud rattling noise at intervals of from 
ten to thirty minutes, depending apparently on the strength of the 
sunshine. One will start sounding and the impulse will spread to 
others near until the whole field is flooded with an indescribable 
din. After from fifteen to thirty seconds it will stop about as it 
started. This peculiarity of shrilling makes it all but impossible 
to locate their sound and with hundreds about you it is hard to 
find one. 
262. Tibicinoides cupreo-sparsa Uhler. This very pretty little 
species was abundant this season from April 26th until 
nearly the first of June. It occurs almost exclusively on a 
certain fine tufted grass, probably a Poa, growing on the 
hillsides about La Jolla and up Mission Valley and adjacent 
canyons as far as the old Mission and perhaps farther. The 
The bright red on the base of the wings gives this species 
a lively appearance when spread. Like hesperia Uhler it 
has the basal one half of the elytra infuscated. It has a 
shrill but feeble note which is long continued and easy to 
locate but can rarely be heard for more than one hundred 
feet. 
263. Platypedia minor Uhler. Exceedingly abundant everywhere 
near the coast this season and not uncommon as far back as 
Alpine. The first specimens were taken on March 22nd and 
occasional specimens were found as late as July. It makes 
a short peeping noise constantly repeated but it is not an 
easy sound to locate. It varies much in size and seems to 
prefer grassy places. 
Family APHROPHORIDAE 
264. Aphrophora angulata Ball. San Diego, Lakeside and Alpine. 
May to July. Taken on willow. 
265. Clastoptera obtusa obtusa Say. Alpine, October; one ex- 
ample. 
266. Clastoptera obtusa achatina Germ. Beaten from pine trees 
in the Cuyamacas in October, 1918. 
267. Clastoptera lineaticollis Stal. May to October, not uncom- 
mon. 
Family MEMBRACIDAE 
268. Ceresa bubalus Fabr. Occasional on willows but not as 
abundant as in the east. 
269. Ceresa albidosparsa Stal. May to October, common. 
270. Stictocephala inermis Fabr. One male taken in San Diego, 
January 1913. 
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