No. 407.] A NEW MYRMECOPHILE. 861 
together ; joints six to eleven of gradually increasing length, 
but little narrower than the basal joint. Pronotum evenly 
rounded in front, considerably broader than the meso- and 
metanota, and as long as both of these regions taken together. 
There is a brown spot on either side above the eye. Tegmina 
rhomboidal, without traces of nervures, covering and extending 
somewhat beyond the meso- and metathoracic segments, and 
meeting for a short distance in the mid-dorsal line. Wings 
very small, vestigial, completely covered by the tegmina and 
exhibiting only very feeble traces of nervures. Abdominal 
segments short and broad, the first concealed, considerably 
narrower than the succeeding segments ; terga of seventh and 
eighth without hairs and lighter in color than the preceding 
segments ; tergum of ninth segment, forming the lamina supra- 
analis, subtriangular, not more than one and one-half times as 
broad as long, rounded behind, and fringed with a few hairs. 
Cerci very short, not longer than broad, ovoidal, one-jointed, 
covered with radiating hairs except over an elongate, glabrous 
area on the upper surface. Subgenital plate small, rounded 
and smooth, projecting beyond the supra-anal lamina and 
turned to the left. Above the subgenital plate lies a pointed, 
spine-like projection (penis ?), which turns to the right side. 
Stylets apparently absent. Legs short, flattened, the pairs 
increasing in length from before backwards ; tips of the fore 
femora far from reaching the pleural edges of the prothorax, 
those of the hind pair just reaching the lateral edges of the 
abdomen. All the femora furnished with spines on their 
lower surfaces. Tibiæ, especially the middle and hind pairs, 
with robust spines on their extensor edges and at their tips. 
Tarsi short, flattened, second to fourth joints oblique ; fifth 
joint provided with a distinct arolium between the claws. 
Female (Figs. 4 and 5).— Length 3.25-3.5 mm. Differs 
from the male in the following characters : Body much broader 
and more rounded behind ; meso- and metathoracic segments 
without tegmina or wings, but with broad pleural flaps, so that 
these segments are slightly wider than the prothorax, though 
their antero-posterior diameter is only about half that of the 
large pronotum. Posterior edges of the lamina supra-analis 
