196 THOMAS SAY FOUNDATION 



Holotvpe and Allotype. — Male and female, No. 

 20552, U. S. N. M. 



No. 89. Sarcophaga thatuna n. sp. 



An elongated, blackish western species. 



Male. Front .182 of head (average of six, — 

 .163, .174, .178, .179, .183, .217); parafrontals and 

 parafacials pale yellow polhnose, shining, the latter 

 with the usual row of hairs, the lower ones coarse; 

 frontals about 13 in number, rapidly diverging be- 

 low, reaching a little below the base of the second an- 

 tennal joint; ocellars distinct; antenna blackish, the 

 third joint brown, twice as long as the second and 

 reaching four-fifths of the way to the vibrissa?, which 

 are barely above the oral margin; arista plumose for 

 three-fifths of its length; facialia with rather con- 

 spicuous hairs for nearly half their length ; palpi and 

 proboscis black, ordinary; bucca one-third the eye- 

 height; back of head with about four rows of black 

 hairs, the pale hairs confined to the space around the 

 neck and below it; outer verticals not developed. 



Thorax with rather thin gray pollen, the usual 

 3 to 5 black stripes; the submedian gray stripes in- 

 distinctly divided before the suture; ps dc four; ant 

 acr none; prsc, one pair; stpl three; scutellum with 

 2 or 3 marginal pairs, one or two preapical and one 

 smallish apical pair. 



Abdomen with rather silvery changeable pollen, 

 with indications of three stripes ; first and second seg- 

 ments with only lateral bristles, several on each seg- 

 ment; third segment with a median marginal pair 

 and a short lateral row; fourth segment with a dense 

 marginal row of about 24. 



First segment of hypopygium shining black or 

 brown on its hind margin, with a row of stout hairs; 

 second segment globose, shining, with numerous 

 erect hairs; forceps long, straight, shining black, 

 more brown on the base ; near the tip rather abruptly 

 bent forward, tapering to a point without a distinct 

 hook; accessory plate yellow, moderately elongated. 



