[March 
16 Psyche 
much closer than that of the Old World species to their 
myrmicine hosts. 
The new species is described below, illustrated by several 
figures drawn by Mrs. A. S. O’Connor. The latter are to a 
great extent based on Dr. Kennedy’s very excellent sketches 
which he placed at our disposal. 
Solenopsia Wasmann. 
Zoologica, Heft 26, p. 171 (1899). 
Solenopsia americana sp. nov. (Fig. 1) 
9. Length 1.3 mm. Black; the thorax and abdominal 
petiole light reddish brown; the abdomen stained with 
brown below on the sides basally and pale at extreme tip; 
legs and antennse more yellowish than the thorax. Head 
smooth and shining; the eyes small, rounded, placed well 
forward on the sides of the head at about the middle ; ocelli 
small, in a small equilateral triangle. Antennse 11- jointed, 
inserted above a very narrow shelf at the level of the eyes ; 
scape long, nearly as long as the head, curved and much 
thicker toward apex; pedicel longer than wide, about one- 
fourth as long as the scape; first flagellar joint much nar- 
rower than the pedicel, especially at the base ; following six 
joints gradually wider and of about equal length, each 
shorter than the pedicel; last three joints forming a large, 
abrupt club, the basal joint narrowed at base, the second 
widest and the third longest. Seen in profile the head is 
evenly arcuate above and the long, sharply receding face 
forms a straight line above, curving inward toward the 
mouth; mandibles small, more or less triangular and ap- 
parently pointed at apex. Pronotum short at the median 
line, but extending back to the tegulaei as a broad lateral band 
on each side of the mesonotum; scutellum separated by a 
very fine transverse basal suture, its posterior narrowed 
portion convex, with the basal impression single, with each 
side bent posteriorly in the form of a broad, inverted cres- 
cent; propodeum much narrowed above with the apex 
sharply widened and concave behind to form two backward- 
ly directed arms which encircle the sides of the abdominal 
petiole when the latter is turned upwards, these arms more 
or less acute apically. Upper surface of abdominal petiole 
