June, 1913] AlDRICH : NORTH AMERICAN SpECIES OF LiSPA. 131 



localities; it is therefore not mentioned herein except where some- 

 thing of special interest is brought out. 



Table of Species of LISPA. 

 Males. 



1. Fifth abdominal segment black, with a chall<-white central spot above, 



conspicuous from behind 2. 



Fifth abdominal segment not so marked 7. 



2. Second joint of middle tarsus shorter than the third sordida n. sp. 



Second joint longer than third 3. 



3. Palpi black, vibrissas wanting palposa Walker. 



Palpi yellow or whitish 4. 



4. Hind tarsus as long as its tibia salina n. sp. 



Hind tarsus shorter than its tibia 5. 



5. Fourth joint of middle tarsus prolonged in a slender spine as long as the 



fifth joint spinipes n. sp. 



Fourth joint not with spine ; with unusually long hairs between and out- 

 side of the fronto-orbital bristles 6. 



6. Vibrissae delicate, hardly distinguishable; sides of face bare above 



brevipes n. sp. 

 Vibrissae normal, sides of face above with rather coarse hairs 



johnsoni n. sp. 



7. Front metatarsus with a prolongation beside the following joint .... 8. 

 Front metatarsus without such prolongation 9. 



8. First two joints of front tarsi reddish ; the second more than twice as 



long as the body of the first tentaculata De Geer. 



Second joint hardly longer than the first patellata n. sp. 



9. Front tarsus elongated (its first two joints as long as its tibia), pale in 



the middle, last point enlarged, triangular, black . . . albitarsis Stein. 

 Front tarsus of ordinary form, about as long as tibia 10. 



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



With three 11. 



11. Tibiae black 13. 



Tibiae red 12. 



12. Abdomen with a pair of large, shining black, sub-confluent spots on each 



of segments 2, 3, and 4 ; antennae long, front narrowed below 



idiginosa Fallen. 



Abdomen pruinose, with only faint traces of spots ; antennae shorter, front 



not narrowed below antennata n. sp. 



13. With distinct white spots on the 4th and 5th abdominal segments 



sociabilis Loew. 

 Without such spots polita Coquillett. 



