June, 1913-] AlDRICH : NORTH AMERICAN SpECIES OF LiSPA. 132 



Females. 



1. With four post-sutural dorso-centrals nasoni Stein. 



With three 2. 



2. Palpi black 3. 



Palpi pale 4- 



3. With a heavy velvet-black band from eye to eye across the root of the 



antennse palposa Walker. 



With a faint band or none sordida n. sp. 



4. Abdomen wholly shining black polita Coquillett. 



Abdomen largely pollinose 5. 



5. Palpi gradually enlarged, with straight sides 6, 



Palpi suddenly enlarged, with curved sides 8. 



6. Sides of face narrow and with a few fme hairs albitarsis Stein. 



Sides of face wide and with numerous coarse hairs 7. 



7. Abdomen with two large, shining black areas on each of segments 2, 3, 



and 4 uliginosa Fallen. 



Abdomen almost wholly gray pollinose antennata n. sp. 



8. Third and fourth abdominal segments with a white pollinose spot (rarely 



yellow) on each side, the middle shining black or with a pollinose 



spot behind tentaculata De Geer. 



sociabilis Loew. 



patellata n. sp. 



Third and fourth abdominal segments rather uniformly grayish pollinose 9. 



9. Front at antennae narrower than either eye spinipes n. sp. 



Front at antennae wider than one eye 10. 



10. Bristles of under side of hind femora much larger beyond the middle 



salina n. sp. 



Bristles of the under side of hind femora equally large on the basal half 



johnsoni n. sp. 

 Lispa sordida new species. 



Male. — Head 3.21 times the width of the front at narrowest place; ocellar 

 triangle yellow pollinose, frontal orbits gray, the rest of the front dull black ; 

 antennae wholly black, third joint small, i^ times as long as second, arista 

 short, with thin long plumosity ; sides of face silvery, with only a few hairs 

 on the lower part ; middle of face brownish-yellow pollinose ; vibrissae of 

 moderate size, surrounded with only a few small hairs ; palpi dark brown to 

 black, occasionally reddish-brown, dilated rather suddenly to a medium size 

 for the genus ; the outer side of the dilated portion seems in the normal posi- 

 tion to show as a white pollinose spot from in front. Occiput brownish 

 pollinose. 



Mesonotum half-shining or less, the pollen gray or brownish ; one pair of 

 small prescutellar bristles, the hairs of the scutellum long ; halteres yellow 

 with brown knob ; calypters ivory-white with faint yellow border. 



Abdomen narrow, a little flattened, with gray pollen, which in some speci- 

 mens becomes brownish on the sides ; the second segment has a subshining 



