SARCOPHAGA AND ALLIES 155 



facials silvery poUinose, the pollen being rather 

 coarser than usual; parafacials with a row of hairs 

 below, which are occasionally rather strong; frontal 

 bristles about seven, descending to the base of the 

 second antennal joint, not very w^idely divergent. 

 Antennae black, the third joint not quite as long as 

 the second, reaching four-fifths of the way to the vi- 

 brissas, which are at the oral margin ; arista long, plu- 

 mose for about two-thirds of its length. Palpi black; 

 proboscis small; bucca one-fifth the eyeheight; back 

 of head with three rows of black hairs and a few pale 

 ones around the neck as well as below. 



Thorax gray pollinose with the usual 3 to 5 black 

 stripes ; ps dc 3 ; ant acr not differentiated ; prsc very 

 minute; stpl 3; scutellum with 2 large marginal, 1 

 small preapical and one small apical. The second 

 submarginal is usually long, reaching to about the 

 middle of the third abdominal segment. 



Abdomen black and silvery, with changeable tes- 

 sellation; fourth segment mostly red; first and sec- 

 ond segments with only lateral bristles ; third with an 

 interrupted row ; fourth with a row of ten. 



Hypopygium red, rather large; first segment 

 considerably retracted, with a few short hairs on the 

 hind margin; second segment red, subshining, glo- 

 bose, with a few rather large erect hairs, two of which 

 are quite bristle-like. Forceps nearly straight, slen- 

 der, not divergent, red nearly to apex, gently in- 

 clined forward near tip, which is moderately sharp 

 but not hooked. Accessory plates large, yellow, 

 drawn together behind the penis and not distinctly 

 separated from the body of the second segment. Pos- 

 terior clasper black, rather short, stout and strongly 

 curved; anterior ones much more slender, yellow, 

 with hooked slender tip. Penis with yellow basal 

 joint, much constricted between the segments, the 

 distal one slender and yellow for a third its length, 

 then suddenly large, globose and black; there is a 

 large lateral plate on each side, circular, partly white ; 

 these unite in front and conceal the inner parts ex- 



