NATHAN BANKS. 231 



dian, while in Suhpalasca there is a row parallel to the radial 

 sector, or rather its branch, and below it the venation is more 

 irregular. 



PANORPIDAE. 

 The genera of Panorpidae may be arranged in the follow- 

 ing groups and tabulated as below : 



1. Head deflected under pronotura ; eyes nearly connate above; no 



ocelli ; costal area of fore-wings with many veins ; each tar- 

 sus ends in two small claws MEROPEINAE — 3. 



Head prominent from above ; eyes widely separated above ; costal 

 area of fore-wings with few veins 2. 



2. No ocelli ; wings rudimentary ; tibial spurs very weak ; each tarsus 



with two small claws ; female with long corneous ovipositor. 



BOREINAE— 4. 

 Ocelli present; tibial spurs distinct PANORPINAE— 5. 



3. Anal area and rest of fore-wings with many cross-veins forming 



several rows of cells ; legs very bristly ; subcosta and radius 

 run close together for some distance and then both fork ; 



antennae slender Notiotliauina. 



Anal area with few cross-veins ; legs with only apical bristles ; an- 

 tennae thickened ; subcosta with branches hardly forked. 



Merope. 



4. With but one genus Boreas. 



5. Tarsi end in two small claws ; tibial spurs not very long ; middle 



joint of labial palpi enlarged 6. 



Tarsi end in one claw ; last joint bending back on the preceding ; 

 tibial spurs extremely long ; middle joint of labial palpi 

 slender ; median vein of fore-wings forked near base. 



BiTTACINI — 9. 



6. Median vein of fore-wing forked near base, cubitus simple. 



Choristini — 7. 



Median vein of fore-wing not forked near base, but the cubitus is 



so forked Panorpini — 8. 



7. Several costal cross-veins and several cross-veins from subcosta to 



radius (new genus or subgenus). 

 One costal cross-vein (near base) and two from subcosta to radius. 



Chorista. 



8. Beak much longer than distance between eyes ; no spine on cheeks. 



Paiiorpa. 



Beak very short, not as long as distance between eyes ; u spine on 



each cheek Paiiorpo<l«'S. 



9. No wings ; no elevated mesothoracic lobes ; and the posterior ocelli 



are more than twice their diameter apart. .Aptcrobittaciis. 



Wings present ; elevated mesothoracic lobes ; posterior ocelli not 



twice their diameter apart Bittaciis. 



TRANS. AM. ENT. SOC. , XXXIX. 



