﻿6 PROCEEDINGS OF THE NATIONAL MUSEUM vol. loo 



middle, then curve inward again to mandibles, where their ends form 

 the anterior mandibular condyle; the marginal clypeal bands are not 

 deeply pigmented except along their inner edge and a blotch at base 

 of antennae, from which blotch they continue backward (faintly) 

 across the antennary fossae and join the temporal bands, the latter 

 being narrow and sinuate, and end at the long hair in the middle of 

 the temples. A rather deeply pigmented band (the antennal) sur- 

 rounds the antennary fossae on the ventral surface. Faint occipital 

 bands extend backward from the posterior mandibular condyle to the 

 anterolateral angles of the prothorax, which lie at some distance under 

 the head. 



Prothorax is small, quadrangular, with all angles rounded, sides 

 almost straight and but slightly divergent. Ptero thorax scarcely 

 longer than prothorax, with straight divergent sides, broadly rounded 

 posterolateral angles and with posterior margin angulated medially 

 and not much wider than segment I of abdomen. 



The abdomen is elongated oval, widest at segment IV. Segment I 

 has the sides straight and parallel, while in II they are strongly diver- 

 gent. The pleural plates are narrow and faintly pigmented; the tergal 

 plates in the male are fused with the pleurites, are uniformly but 

 faintly colored, and extend across entire abdomen, but are separated 

 by hyaline bands widening posteriorly progressively. The sternal 

 plates are less deeply pigmented and scarcely separated from each 

 other by hyaline bands. Segment VIII is longer than VI and VII, 

 with apex rounded and indented medially. 



The genitalia extend across the last three segments of the abdomen, 

 and though the basal plate is short the parameres are unusually long 

 and very straight, with long slender tips. The distinctive oval tuber- 

 cles at the base of the parameres are also large. The endomeral plate 

 is simple, less than half as long as param.eres, and ends in a short 

 thick penis. In the female the abdominal tergites are broken medially 

 in. segments I to V and have the portion adjoining the pleurites more 

 deeply pigmented. Segment VIII has the shape similar to that of 

 male but is wider basally, with sides more convergent to the rounded, 

 slightly indented tip. There is the usual row of short setae curving 

 across the anterior portion of segment VIII (ventral), these being of 

 two kinds, one finer and longer, alternated with short, thick bristles. 

 The pair of heavy spines at the anterior angles are rather short but 

 are thick basally and taper to very slender tips; the patch of setae 

 posterior to the long spines is very meager, consisting of about seven 

 or eight short, slender hairs. The chaetotaxy of the body is shown 

 correctly in the figm-e and need not be described. The species is 

 represented only by the male holotype and female allotype. 



