30 . AMERICAN NEUROPTKRA. 



SYNOPSIS OF SPECIES. 



1. Basal cross-vein connecting median to radius ends upon radius near to con- 



necting veinlet between radius and subcosta, and is shorter than dis- 

 tance out to first radial sector 2. 



Basal cross-vein ends near first radial sector, at least not more than its length 

 therefrom 6. 



2. Last veinlet of inner gradate series below or basad of the previous one (rarely 



a little beyond it); pterostigma, especially of hindwings, usually dis- 

 tinctly rufous ; forewings more narrow 3. 



Last veinlet of inner gradate series distinctly beyond previous one; ptero- 

 stigma barely, if at all, rufous; forewings broader 5. 



3. Eastern specimens stigmaJerus. 



Western specimens 4. 



4. The second radial sector arises much nearer to the third than to the first. 



kokaneeaiiiis. 

 Radial sectors at subequal distances at origin in<eMtiis. 



5. Eastern specimens Iiliniuli. 



Western specimens pacificus. 



6. Practically no markings, except dots along the veins 7. 



With larger spots and bands 8. 



7. Smaller, pale species, three radial sectors hyaliiiHtliS. 



Larger, darker species, usually four radial sectors dorsalns. 



8. The second fork of cubitus beyond basal connecting veinlet is almost as near 



to the first fork as to the third ; the last veinlet of inner gradate series 



is beyond the previous one coclsert'Ili. 



The second fork of cubitus beyond basal connecting veinlet is much nearer to 

 the third than to the first; last veinlet of inner gradate series usually 

 below or basad of previous one 9. 



9. Face blackish ; apical margin of wing not marked with patches of white and 



dark conjniictus. 



Face pale, apical margin of wing marked witii large patches of white and 

 dark iievadeiiMiis. 



Three species are not included in the above table. 



H. simplex differs from H. stigmaterus and H. mcestus by smaller 

 size and different genitalia. 



H. margtiiatus differs from M. himiili in having a broader costal 

 area. 



H. simulans differs from H. hwmdi in more slender wings and in 

 being more heavily marked. 



Hemerobins stigmateru)^ Fitch.— Head pale yellow, a reddish brown 

 stripe each side from near eye to mouth; antennae pale yellow; palpi marked 

 with red-brown ; thorax with a broad median yellow stripe, and a red-brown 

 stripe each side; abdomen brown, often yellow at tip; legs pale yellowish. 

 Wings hyaline, venation yellow, dotted with brown, from which arise angular 

 brownish fascia upon the membrane of wing; the gradate veins brown, and the 

 veinlet connecting median and cubitus heavily brown ; pterostigma brown, dis- 



