426 INSECTA SAUNDERSIANA. 
mark, Male.—Abdomen pubescent, brown at the tip, much longer than 
that of the female. Length of the body 2—2} lines; of the wings 34 
lines. 
Van Dieman’s Land. 
Genus TANYPUS, Meigen. 
Tanyvus cHorevus, Meigen. 
United States. 
Genus PACHYLEPTUS, n.¢. 
ee Mas. Corpus gracile. Caput parvum, subrotundum. Palpi me- 
diocriter longi. Thorax convexus. Abdomen gracile, subeylindricum, 
basi subcontractum, thorace duplo longius. Pedes posteriores longius- 
culi, sat graciles, femoribus subclavatis; antici raptorii, femoribus cras- 
sis, tibiis subareuatis. Ale anguste. 
Nearly allied to Ceratopogon. Male.—Body slender. Head small, 
nearly round. Palpi moderately long. Antenne mutilated. Thorax 
convex. Abdomen nearly cylindrical, somewhat contracted towards the 
base, much more slender than the thorax, and almost twice its length. 
Posterior legs rather long and slender; femora subclavate. Fore legs 
raptorious; femora thick, tibie slightly curved, closely applied to the 
femora. Wings narrow; veins like those of Ceratopogon in structure. 
Pacuy.eptus Fasoratus, Mas. 
Niger, nitens ; ale limpide, fasciis tribus nigricantibus latiusculis ; 
halteres albi. 
Plack, shining, as are also the legs. Wings limpid, with three 
rather broad blackish bands. Halteres white. Length of the body 2 
lines ; of the wings 4 lines. 
South America. 
