174 ENTOMOLOGICAL NEWS. [April, ’08 
my table here together with descriptions of four undescribed 
species, including two of our most common California forme. 
I have not seen specimens of P. affinis Bell. or P. excelsior 
Berg. and cannot from the descriptions select any characters 
which would not apply equally well to some of my specimens 
of P. incurva Lw. so these three species are placed together 
in the table until further study shall show some characters by 
which they may be separated. P. occipitalis Lw. occurs in 
two places as in the original table, as I find that desirable on 
account of the occiput being more or less shining, sometimes 
almost opaque. 
1, Thorax wholly black... . 2 1 n6, 6:05 6.5 9 se nee a. 
Thorax not wholly black. . . . 2 0. 5% 0" 4. 
2. Abdomen altogether black. ............,- altissima O. S. 
Abdomen reddish-yellow toward the base. . . . erythrophrys Will. 
3. Thoracic stripes black . . 2. s0%. 4) + 5 1s) y)iss 4. 
Thoracic stripes brownish or reddish, sometimes obsolete .. . . 18. 
4. Wings hyaline... . . . . «6 «6 pie > fe 5. 
Wings with a yellowish or brownish tinge... ........-. 12. 
incurva Lw. 
5. Anterior end of the lateral stripes curved. . . . affinis Bell 
excelsior Berg. 
Anterior end of the lateral thoracic stripes not curved ...... 6. 
6. Pieura without spots ; occiput without a black spot. . virescens Lw. 
Plepra with spots . 2... oe a) a ¥. 
7. Pleura for the most part cinereous. .......... collaris Say. 
Pleura not cinereous. . . . . . 4» » : 4 (h) bec gee 8. 
8. Pleura yellow, with yolk-yellow spots. ....... ordinaria O. S. 
Pleura variegated with brownish fuscous or blackish spots . . . . 9. 
9. Head wholly Diack’... 2... Mews ee californica n. sp. 
Head yellow, with a black spot on the occiput... ....... fe) 
to. A small black spot between the antennz ; the black spot on the occi- 
put does not reach over the vertex ..... pedunculata Lw. 
No spot between the antennz ; the black spot on the occiput reaches 
over the vertex... .. 2.4 . sy es ee, 
11. Pleura variegated with several fusco-blackish spots, posterior margin 
of the eighth sternite of male only gently curved . .vittula Lw. 
Pleura sulphur-yellow, with only one or two reddish-brown spots ; 
posterior margin of the eighth sternite of male with a deep 
V-shaped incision. .. 14°... 2.) eee snowii n. sp. 
12. Wings with a brownish or brownish-yellow tinge ........ 13. 
Wings with a yellowish tinge, at least along the anterior margin . 14. 
