122 THOMAS SAY FOUNDATION 
Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. 
Pteronarcys 
*biloba 
*californica 
comstocki 
*dorsata 
nobilis 
*princeps 
*proteus 
Pteronarcella 
badia 
*regularis 
Perlodes 
*americana 
aurea 
bradleyi 
dolobrata 
ignota 
irregularis 
lineata 
minor 
*signata 
slossonae 
*tibialis 
yosemite 
vagans 
lsogenus 
*colubrinus 
elongatus 
frontalis 
Perla 
*aestivalis 
alaineda 
*bilobata 
*capitata 
crosbyi 
duplicata 
*expansa 
fugitans 
*hastata 
*immarginata 
innubila 
kansensis 
languida 
luctuosa 
*niedia 
modesta 
nona 
obscura 
phalerata 
postica 
ramosa 
sabulosa 
sorpta 
tincta 
varians 
venosa 
*verticalis 
=o 
ae 
SI] 
aq Hazezs 
on nin Pimpdink 
4 
