70 THOMAS SAY FOUNDATION 



No. 22. Sarcophaga cockerellse n. sp. 



Male. Front .221 as wide as head (average of 

 two, — .215 and .226) ; somewhat golden near vertex, 

 paler, almost silvery, below and on parafacials, rather 

 protuberant at insertion of antennee; 10 frontals in 

 row, diverging anteriorly; middle stripe much wider 

 than one paraf rontal ; a row of about 4 bristles below 

 near eye, the middle two large; antennae black, third 

 joint hardly twice the second and reaching three 

 fourths of the way to vibrissa, which are on the oral 

 margin, palpi and proboscis black, ordinary ; bucca al- 

 most half the eyeheight; back of head with 3 series of 

 black hairs, the pale beard not very abundant. 



Thorax with the usual 3-5 black stripes, other- 

 wise light gray; anterior acrostichals well developed, 

 3 pairs; one pair prescutellars ; 3 ps dc, strong; scutel- 

 lum with 2 marginal, 1 subapical, 1 apical, the last 

 quite large. 



Abdomen black with whitish tessellations; sec- 

 ond segment with a pair of median marginals, but 

 small and dej^ressed; third segment with a row of 10; 

 fourth with row of about 20. 



Hypopygium black, shining, the first segment 

 but little visible; forceps wide, strongly divergent at 

 tips, which are excised in front to a clawlike tooth; 

 penis hooded, but the terminal member protruding in 

 front, divided at tip into several parts, the two lateral 

 of which are turned back. 



Legs black, middle femora without combs; mid- 

 dle tibia? with 3 large bristles on outer front side; 

 hind tibias with sparse long villosity on both inner 

 and outer sides in front. 



Wings subhyaline; costal segments 3 and 5 

 equal ; third vein with about 7 setules. 



Female. Front .335 of head; paraf rontals and 

 parafacials more gray; scutellum without apical 

 bristles; second abdominal segment without median 

 marginals; genital segment black, opening in a ver- 

 tical slit which is guarded with small bristles. 



Length of male, 8 mm. ; of female, 5 mm. 



