DIPTERA. 247 
clothed with black hairs above the base of the feelers and on the tubercle 
of the eyelets: eyes black: mouth pitchy: feelers pitchy; sixth joint 
tawny, black towards the tip: chest clothed with tawny hairs ; scutcheon 
tawny : breast grayish: abdomen deep black, obconical, a little shorter than 
the chest, adorned with two large tawny spots on each side of the second and 
third segments ; hind borders of the segments tawny ; underside tawny with 
a black tip: legs tawny, clothed with short tawny hairs; feet and tips of 
the shanks clothed with black hairs; thighs black with tawny tips ; tips of 
the shanks and of the feet black; foot-cushions and claws tawny; tips of 
the’ claws black: wings colourless, brown at the base, with a slight tawny 
tinge along the fore border ; brands pale brown; wing-ribs pitchy; veins 
black, pitchy at the base. Length of the body 4 lines; of the wings 8 
lines. 
N orth America. 
Erisraris CaaLepus, Fem. 
Nigro-fuscus, thorace vittis duabus canis abbreviatis ornato, abdomine 
maculis duabus fulvis fasciisque tribus pallidioribus, segmentorum 
marginibus posticis ventreque plumbeis, antennis nigris apice piceis, 
pedibus nigris, tibiis fulvis, alis subcinereis basi et ad costam sub- 
fulvis. 
Black : head covered with pale buff down, clothed with pale buff 
hairs and on the crown with black hairs; face with the usual bare shining 
stripe which is raised along the whole length until near the feelers; eyes 
black: mouth black ; tips of the palpi and of the maxille tawny: feelers 
black; third joint pitchy; sixth tawny with a black tip: chest brown, 
clothed with tawny hairs, adorned with two hoary stripes which do not ex- 
tend beyond half the length from the fore border : abdomen obconical, a 
little longer and broader than the chest, adorned with three slender pale 
buff interrupted bands, and on each side near the base with a large somewhat 
triangular tawny spot whose inner border is concave ; the first and the second 
bands form curves on each side, the third is near the tip and very small ; 
hind borders of segments and whole of underside lead-colour, shining : legs 
black, clothed with short black hairs; shanks tawny, clothed with tawny 
hairs towards the base ; shanks and feet covered beneath with tawny down : 
wings pale gray, slightly tawny at the base and along the fore border ; brands 
