718 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxiii. 



and heavy, tenth segment with apical three- fourths split above. Each 

 ventral abdominal plate in front of the base of the ovipositor, except 

 segments one and two, with a transverse row of six prominent spines 

 on the posterior border, three on each side of the middle line. Pos- 

 terior border of the eighth dorsal plate denticulate. Ventral pleural 

 plates strongly denticulate behind. Each dorsal pleural plate with 

 a strong spine on its lower posterior corner. 



Type.—C^i. No. 11360, U.S.N.M. 



Described from fifteen females (cotypes), of which six (one slide) 

 are deposited in the collection of the United States National Museum 

 and the remaining nine (three slides) in the collection of the Massa- 

 chusetts Agricultural College. There are also numerous paratypes 

 in the collection of the latter institution. 



Male. — Length, 0.96 mm. to 1.5 mm. ; width of head, 0.17 mm. to 

 0.22 mm. ; Avidth of prothorax, 0.18 mm. to 0.28 mm. ; width of meso- 

 thorax, 0.23 mm. to 0.38 mm. ; greatest width of abdomen, 0.21 mm. 

 to 0,32 mm. Color gray-brown to brown, generally lighter than the 

 female; head and apical segments of the abdomen the darkest por- 

 tions; pterothorax generally lightest. Antennse about two and one- 

 third times as long as the head; relative lengths of segments as 

 follows : 



A A A _i_ ^^ ^L JL _§_ 



7.8 9.8 15.2 15.2 11.4 14.4 3.1 3.8 



Wings reaching but little beyond the anterioi' l)()rder of the seventh 

 abdominal segment. 



The third to seventh, inclusive, ventral abdominal plates each with 

 a transverse sole-shaped marking in the middle, this marking being 

 about one-half as long as the plate is wide. Abdomen widest at 

 the fourth segment. Anterior femora thickened, about two-fifths as 

 w^ide as the head, proportionally thicker than in the female. On the 

 middle of each side and on each posterior angle of the ninth abdom- 

 inal segment is a very large strong spine, and a similar one is present 

 on each posterior dorsal angle of the tenth segment. All these spines, 

 as w^ell as most of the others of any prominence on the apical seg- 

 ments, are dark colored. 



Described from thirteen specimens (cotypes) of which four (two 

 slides — one of these being the slide which has the female type speci- 

 mens) are deposited in the collection of the United States National 

 Museum and the remaining nine (five slides) in the collection of the 

 Massachusetts Agi-icultural College. 



Food plants. — Black willow, Bonaviste (a legume), eddoe (a va- 

 riety of yam), bean, roses (several varieties), guinea grass, potato, 

 papaw, pepper, tobacco, white wood, Cordia (red), woolly pyrol. Con- 

 volvulus., ground nut, arrow root, yam, flamboyant. Usually found 

 on flowers and in colonies. 



