160 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Slr. 



Tables of Species 

 Males 



1. Femora largely yellow (Southern California) .rf;>c/a, new species 

 Femora black 2 



2. Front with two or three pairs of cruciate bristles 3 



Front with a single pair 4 



3. Front with three pairs, the lower farther apart ; ant acr with 



scattered minute hairs between (Bering Straits) 



bicruciata Stein. 



Front with two pairs, the lower farther apart, ant acr without 

 scattered minute hairs (Caliiornia.) ... .evermanni, new species 



4. Hind femora beneath at extreme base with a tuft of short spines. . 5 

 Hind femora plain 7 



5. Middle tibiae on inner front side with one or two distinct bristles 6 

 Middle tibiae without bristles on inner front side (Atlantic coast; 



Europe) maritima Hal. 



6. Hind femur at base close to the tuft of bristles with a knoblike 



protuberance turned toward the body, which is also beset with 

 short spines (Greenland to Bering Straits, and down the Pacific 

 coast; Europe) fucorum Fall. 



Hind femur with only the tuft 6^j 



6>4.Head square in profile, the front flattened, protuberant anteriorly 

 (Greenland; Arctic North America) ariciiformis Holmg. 



Head globular, front as usual ; front of wing clouded beyond mid- 

 dle (Kodiak Island, Alaska) hinei, new species 



7. With a large dark spot in apical half of wing (Greenland; Arctic 



North America) pictipennis Beck. 



Wing unspotted 8 



8. Middle femur with stout bristles below, which on the apical half 



are short and comblike; costa with long spines (California)... 



costalis Stein. 



]\Iiddle femora without such bristles, costa with short spines . . 9 



9. Hind femora beneath on apical half with a close-set row of about 



14 slanting bristles (Alaska) antennata Stein. 



Hind femora with only three to five bristles beneath 10 



10. Prealar absent, bucca as high as eye (California) . ..y^/'ara^a Stein. 

 Prealar present, bucca not so high II 



11. Tibiae red, hind ones with only two or three bristles on outer 



front side (California ; Washington) rtifitibia Stein. 



Tibiae black, hind ones on outer front side with a row of about 

 8, the upper small (British Columbia) astnum, new species 



Females 



1. Femora yellow (Southern California) . .. .rejecta, new species 

 Femora black 2 



2. Front with two or three pairs of cruciate bristles 3 



Front with a single pair 4 



