SARCOPHAGA AND ALLIES 211 



Abdomen black and silvery, tessellated, very 

 robust, segments short and deep. First two with only 

 lateral bristles; third with a pair of coarse appressed 

 hairs in the place of median marginal bristles ; fourth 

 segment with a mixed row of hairs and bristles on 

 the margin, about a dozen are rather stout. 



Hypopygimii red and shining; first segment re- 

 markably long and curved so as to suggest a sausage, 

 from which it is named, and with a row of bristles at 

 the posterior end; the second segment of equal diam- 

 eter with the first and of the same color so that it 

 helps to increase the resemblance to a link of sausage. 

 Both segments have numerous erect hairs. Forceps 

 long and nearly straight, the front and hind edges 

 almost parallel, not pointed at the apex ; viewed from 

 behind they diverge slightly and then converge again 

 at the tips, touching each other; accessory plate al- 

 most white, rather small, with a long basal process 

 running back on the segment. The body of the organ 

 is nearly round, the posterior edge thin and bare, 

 with an indistinct point slightly set off at the apex; 

 posterior clasper short, erect, nearly straight, round- 

 ed at the tip, shining black; anterior clasper rather 

 short, nearly straight on the inner side, the outer 

 curving to a point; penis red, basal segment small 

 and short, distal segment rather small, pointed, most- 

 ly enclosed in a broad expansion of the back plate 

 which, however, is widely open at the tip showing 

 some internal processes when viewed from that di- 

 rection. On the front side of the distal segment 

 there is a thick tongue-like red lobe that turns back 

 toward the base, and there are also on the front side 

 of the middle two minute yellowish hooks and an- 

 other pair widely diverging at the outer margin. 

 Fifth sternite yellow near the base, on each side de- 

 veloped into a pointed erect horn, very striking and 

 readily seen in specimens that have not been spread. 

 From this horn the organ extends laterally to a con- 

 siderable length, bearing dark hairs but no brushes. 



Legs black; middle and hind tibiae with strik- 



