76 THOMAS SAY FOUNDATION 



ond, arista long, plumose to about the middle ; bucca 

 one-fourth the eyeheight ; back of head with only black 

 hairs except around and below foramen; outer ver- 

 tical not differentiated. 



Thorax rather shining, but showing the usual 3-5 

 black stripes ; anterior acrostichals numerous, about o 

 medium-sized pairs ; prescutellars rather large ; 3 large 

 ps dc; 3 stpl; pleurae rather shining, in part rather 

 brown than black ; scutellum with the usual bristles,— 

 2 marginal, 1 subapical (small), 1 apical (medium 

 and crossed ) . 



Abdomen subshining, black, but the hind margins 

 of the segments at the sides and beneath more or less 

 bordered with red, and the fourth always at least one 

 third red ; first and second segments with only lateral 

 bristles; third with a median marginal pair widely 

 separated from the 3 or 4 marginals ; fourth with row 

 of about 14 marginal. 



Legs yellow, including coxce but not the tarsi, the 

 latter almost black ; all the femora in most of the speci- 

 mens with a large dark spot on the front side near tip ; 

 middle femur with two rows of bristles beneath, hardly 

 forming combs distally; middle tibia with one small 

 and one large bristle on outer side near middle ; hind 

 femur with very sparse villosity on both sides in front, 

 only a few hairs; pulvilli large, especially the front 

 ones; base of front tarsus with some longer hairs be- 

 neath. 



Wings rather smoky in color ; third and fifth cos- 

 tal segments about equal; costal spine distinct. 



Length, 6-8 mm. 



Four males: One Miami, Fla., Dec. 19, 1912, 

 on Persea flowers (collected by F. Knab, and belong- 

 ing to the National Museum) ; one with same label but 

 no data about the flower; one Tifton, Ga., Oct. 16, 

 1896, in the Hough collection; one from Crestview, 

 Fla., Oct. 15-16, 1914, in the collection of the Amer- 

 ican Museum of Natural History. 



Holotype.— Male, No. 20497, U. S. N. M., the 

 first mentioned. 



