ART. 9 AMERICAN XYLOTINE SYEPHID-FLIES SHANNON 33 



XYLOTA VIRIDAENEA, new species 



This species has probably been confused with X. analis Willistonj 

 which may account for some of the records of analis from the eastern 

 United States. 



Male. — Medium sized, fairl}^ robust, 10.5 mm., wing 7.5 mm. 

 Head broadly elliptical in frontal aspect; ocellar triangle shining 

 black, with black pile; frontal triangle shining, pollinose only at 

 vertex; antenna brownish yellow; third joint a little longer than 

 broad; arista concolorous with antenna on basal third, darker be- 

 yond, a little longer than width of face; face greenish black; coated 

 with white pollen; mesonotum greenish aeneous with short yellow 

 pile, very few longer hairs present; scutellum rather large, rimmed, 

 colored and clothed as mesonotum ; pleurae darker in color, pollinose 

 and with rather dense golden, coarse pile; femora dark except their 

 apices ; tibiae yellow, the posterior ones more brownish ; tarsi yellow 

 except last two joints in all cases; anterior basitarsus with black 

 ventral basal spines and long yellow hair at dorsal apex, mid basitar- 

 sus with very few black spines on under side, more numerous apic- 

 ally; all pulvilli darkened; mestasternum pubescent; hind trochan- 

 ters with spur; hind femora fairly large with equal spines along 

 nearly the entire length of under side ; first tergite aeneous ; second 

 and third with a pair of large brassy yellow spots on each which 

 extend full width over the sides of abdomen; third tergite rather 

 extensively black posteriorly; fourth tergite greenish aeneous with 

 bright yellow pile on sides, black in middle; wings slightly smoky; 

 third vein nearly straight ; discal cross vein joining discal cell a little 

 beyond middle ; posterior cross vein noticeably shorter than section of. 

 fourth vein above it ; squama with ciiia and halteres yellowish ; post- 

 thoracic spiracle a little smaller than third antennal joint. 



Tyjje.— Cat No. 27312, U.S.N.M. 



Holotype, male. 



X. nehulosa Johnson differs from viriclaenea by its yellow face, 

 black antennae, a single pair of abdominal spots, fourth tergite 

 with entirelv vellow tomentum and clouding of wings. 



X. analis Williston differs in having a shorter arista, more pol- 

 linose frontal triangle, gently curved third vein, and posterior cross 

 vein longer than upper outer section of discal cell. 



Dlstrihution. — Georgia, Thomasville, one male (Mrs. A. P. 

 Taylor). 



XYLOTA NAKNEK Hine 



Male. — Head broadly elliptical ; frontal triangle pollinose, except 

 anterior margin ; ocelli placed nearly the length of their altitude be- 

 fore hind-eye margins; first two antennal joints black; third dark 

 brown, slightly longer than broad; arista black, bare, a little longer- 



