BY FREDERICK A. A. SKUSE. 
1383 
“Palpi concealed, of one distinct joint. Antennse cylindrical, 
11 -jointed; the last four little distinct from one another. Eyes 
reniform. Wings large ; one small linear basal cell ; three 
posterior ; second petiolated.” 
Ohs. — Scatopse appears to have only one joint in the palpi ; I 
could not discover another joint by repeated dissection. Meigen 
and Macquart both set down the number of antennal joints at 
eleven; in my specimens the total is 2- -j- 8-joints, as follows; — 
Second basal joint larger than the first, the seven following 
flagellar joints short, transvei'se, terminal joint the length of three 
of the seven preceding joints, conical. There are three ocelli 
arranged in a triangle on the front, and the abdomen is seven- 
segmented. 
The larvae of Scatopse swarm in excrements, and in decomposed 
vegetable and animal matter. The flies are frequently found upon 
windows, on leaves of plants, in outhouses and privies, &c. 
About sixty species are known, the greater number being 
European, and excepting the following described the remainder 
are American. 
189. Scatopse longipexnis, sp.n. (PI. xxxix., fig. 9.) 
Q. — Length of antennae 0'020 inch ... O' 50 millimHre. 
Expanse of wings O'lOO x 0'040 ... 2'54xl'01 
Size of body O'lOO x 0 020 ... 2'54 x 0'50 
Antennae short, about the length of the head, black, densely 
covered with a very minute pubescence. Head black, with a very 
short yellow pubescence. Eyes black. Palpi yellow. Thorax 
black, nitidous, toleralily covered with a very short yellow pubes- 
cence, a yello\vish spot behind the origin of each wing at the 
fX)sterior corners ; pleurae black, nitidou.s, vnth a pale yellowish 
arcuated stripe running towards the fore coxae ; scutellum and 
metathorax black, nitidous. Halteres yellow, with a few very 
short hairs. Abdomen black, nitidous, rather densely clothed with 
