SARCOPHAGA AND ALIJES 153 



Legs black; middle femur without comb; mid- 

 dle tibia with two bristles on outer front side; hind 

 tibia not villous. 



Wings hyahne ; no costal spine ; third costal seg- 

 ment about equal to the fifth; first and third veins 

 with a dense row of hairs. 



Length 6l/4 mm. 



One male. Dallas ,Tex., April 29, 1914. (Bish- 

 opp No. 3169). Adult collected on flowers of Cha- 

 mopcrista cinerea. 



Holotype.— Male, No. 20531, U. S. N. M. 



No. 71. Sarcophaga biseriata n. sp. 



Male. Front rather wide, .213 of head; para- 

 facials and parafrontals silvery, the former with a sin- 

 gle row of delicate hairs close to the eye; frontals 

 seven, reaching to first fourth of the second antennal 

 joint, not very strongly divergent below; antennae 

 black, rather slender, third joint twice the second and 

 reaching five-sixths of the way to the vibrissa?, which 

 are almost at the oral margin; arista with the usual 

 plumosity for a little more than half its length; palpi 

 and proboscis black, ordinary; bucca over one-fourth 

 the eyeheight; back of head with two rows of black 

 hairs, and rather abundant white ones around the 

 neck and below; outer verticals not differentiated. 



Thorax gray pollinose with the usual 3-5 black 

 stripes; ps dc 3; anterior acr rudimentary, hardly 

 more than hairs ; stpl 3 ; prsc damaged by pin ; scutel- 

 lum ^.ith two marginals and a small apical, no trace 

 of apicals. 



Abdomen with the usual changeable pollen, 

 fourth segment with apical half red; first and second 

 segments with only lateral bristles; third with a me- 

 dian marginal pair and two lateral ; fourth with mar- 

 ginal row of 12. 



Hypopygium red; first segment large and long, 

 not much cm-ved downward, with a row of small bris- 

 tles on hind margin; second segment globose, sub- 

 shining, with erect hairs. Forceps yellow nearly to 



