SARCOPHAGA AND ALLIES 111 



black with a hook on the back at tip, just Hke a cro- 

 chet-hook; accessory plate low and wide, with silky 

 yellow appressed hair ; posterior clasper long, straight 

 and slender, and hooked on the front side at tip; an- 

 terior clasper immense, black, rounded at apex, with 

 a deep concavity on the side; penis yellowish-brown, 

 bulky, hooded, no processes visible. 



Five males, St. Vincent, W. I., as above stated. 



Some of Williston's data are evidently taken 

 from the other sj^ecies, especially the red hypopy- 

 gium. 



Types. — In Entomological Society of London, 

 University of Kansas, and American Museum of 

 Natural History. 



No. 46. Sarcophaga albisignum n. sp. 



Male. Front of more than medium width, .217 

 of head ; frontal stripe reddish black, sharply defined, 

 wider than one side ; frontals 8, strongly divergent be- 

 low, barely reaching middle of second antennal joint; 

 sides of face and front shining yellow pollinose, a lit- 

 tle paler than golden; facial impression concolorous; 

 f acialia black, middle of face whitish ; paraf acials with 

 very few and slender hairs; antennae black, third joint 

 three and one-half times as long as the second, reach- 

 ing five-sixths of the way to the vibrissa?, which are 

 at the oral margin ; arista very long plumose for four- 

 sevenths of its length; bucca one-fourth the eye- 

 height; palpi and proboscis black, ordinary; back of 

 head with all black hairs except a few yellow just be- 

 low the foramen; outer vertical absent. 



Thorax densely whitish pollinose, when viewed 

 from behind the three main black stripes are very 

 strongly contrasted; 3 ps dc; ant acr 1 or 2 smallish; 

 3 strong stpl; prescutellar of medium size; scutellum 

 witli 2 large marginal (a small between them), a 

 small subapical, no apical. 



Abdomen with silvery pollen; median stripe 

 ])lack, a lateral each side very cliangeable; first and 

 second segments with only lateral bristles; third with 



