June, 1913] AlDRICH : NoRTH AMERICAN SpECIES OF LiSPA. 138 



joint of the tarsus somewhat thickened, about equal to the following four, the 

 second longer than the third. Front tibia without a bristle at the middle ; 

 middle femur slender beyond the middle, the bristles on the basal part rather 

 long and slender ; middle tibia with two bristles below the middle ; hind femur 

 not very stout, with long slender bristles in the row beneath, the tibia with 

 long hairs on the outer side and one bristle below the middle. Length 6 mm. 



One male, Moscow, Idaho, August 6, 1912. The female has not 

 been discovered. 



In this species the band across the base of the antennae resembles 

 palposa, and the rather dark palpi and faint vibrissae tend in the same 

 direction but to a less degree. The absence of pattern on the ab- 

 domen shows more of a likeness to johnsoni, which however has ftilly 

 developed vibrissae. 



Lispa johnsoni new species. 



Male. — The only male specimen is somewhat teneral, and the front part 

 of the head is shrunken, making a full description difficult. The front appears 

 to be much as in brevipes, and there are indications of the black band across 

 the base of the antennas ; the hairs between the fronto-orbitals and outside 

 them are long and coarse ; the sides of the front have hairs almost up to these 

 but not so large, although well developed for the location ; vibrissae of full 

 size, and a row of good-sized bristles extending back from them along the 

 epistoma ; antennae in the specimen teneral and shrunken, not showing any 

 unusual features. Palpi dark yellow, slightly brownish, of full size for the 

 genus, rather suddenly enlarged, hairy all over except a small space near the 

 distal edge of the disk. Thorax gray, sub-opaque, very indistinctly striped, 

 or with faint indications of stripes, the bristles strong; a small prescutellar 

 pair is present, otherwise the chaetotaxy is normal; halteres with a brown 

 knob ; calypters ivory-white with yellow margin ; wing normal. Abdomen not 

 flattened, near the base having a section like an equilateral triangle with the 

 corners rounded, almost unicolorous gray, with a slender abbreviated median 

 blackish stripe and on the lower part of the side in the third and fourth seg- 

 ments a trace of a dark triangle ; fifth segment black with a distinct chalk- 

 white median dorsal spot. Fourth segment with irregularly placed bristles 

 on the sides of the disk, and a marginal row. Legs wholly black, including 

 knees, gray dusted ; femora rather stout and hairy ; front tarsi fully as long 

 as their tibiae, the first joint almost as long as the following four; middle tibia 

 with two spines considerably below the middle ; hind tibia with one stout 

 bristle below the middle, 1.64 times the length of the tarsus, first joint of the 

 tarsus not quite so long as all the rest ; the hind femur has on the lower edge 

 the usual row of about ten slender hairlike bristles. 



Female. — In good condition. Head 2.20 times as wide as front, the latter 

 with a velvet black band sharply defined on its lower border; first two joints 

 of antennae velvet black; sides of face rather coarsely hairy all the way up 



