118 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 63. 



17. Antennae with a club (females) 18. 



Antennae without a club ( males ) 24. 



18. Scape bright yellow or reddish yellow 19. 



Scape tinged with brown or piceous 20. 



19. Abdomen longer than the head and thorax united, narrowed tail-like beyond the 



second segment 18. auripes ( Ashmead ). 



Abdomen not longer than the head and thorax united, not tail-like apically. 



19. incerta (Ashmead;. 



20. Abdomen longer than the head and thorax united 20. inermis ( Ashmead ). 



Abdomen not longer than the head and thorax united 21. 



21. Mesonotum more or less flattened in front of the scutellum 22. 



Mesonotum highly convex; length of body 1.10 mm. 21. rufiscapa (Ashmead). 



22. Notauli absent 23. 



Notauli present, reaching nearly to the anterior margin of the mesonotum. 



22. bradleyi, new species. 



2.3. Frons reticulate 23. breviventris (Ashmead). 



Frons transverseh^ aciculate 24. aciculata, new species. 



24. Scape yellow or reddish-yellow 25. 



Scape brown or fuscous for the most part 26. 



25. Fourth antennal joint wider than joints eight, nine, or ten. 



21. ruficapa (Ashmead). 

 Fourth joint narrower than joints eight, nine or ten. .24. aciculata, new species. 



26. Thorax rather long and narrow; notauli nearly complete. .25. floridana (Ashmead). 

 Thorax shorter, notauli absent 27. 



27. Abdomen longer than the thorax, twice as long as wide. 



26. pubescens f Ashmead). 

 Abdomen shorter than the thorax, less than twice as long as wide. 



24. aciculata, new species. 

 1. LEPTACIS STRIATIFRONS Ashmead. 



Plate 1, fig. 1. 

 Leptacis striatifrovs Ashmead, Bull. 45, U. S. Nat. Mus., 1893, p. 273. 

 Female. — Length 1.20 mm. Frons shining, with many transverse- 

 carinae, some of which are curved and in some cases incomplete; vertex 

 separated from the occiput by a high, sharp carina which touches 

 the posterior eye margin; occiput shagreened, with an inconspicuous 

 interrupted, transverse carina midway; thorax more or less elongate, 

 higher than wide, strongly convex above; pronotum and mesonotum 

 finely shagreened, J)ubescent; notauli absent; mesonotum with an 

 inconspicuous median lobe posteriorly, on* each side of which is a row 

 of white hairs projecting over the scutellar fovea; scutellum triangu- 

 lar seen from above, abruptly narrowed behind the middle; upper 

 surface of scutellum flat, making a right angle with the posterior 

 face which is perpendicular; scutellum laterally densely covered with 

 long silvery hairs; abdomen as long as the thorax, elliptical, twice 

 as long as wide; second tergite a trifle longer than wide, polished; 

 last tergite as long as four and five united, wider than long, sha- 

 greened; wings with a short fringe, subhyaline, shining black; antenna 

 (except club), front and middle legs entirely, and tarsi or hind legs 

 golden yellow; antennal club and coxae piceous; trochanters, femora 

 and tibiae (of hind legs) brown. 



