CLAVIGERINAE 355 



within the frame of the oral aperture. Mandibles minute, simple, elongate- 

 triangular, not toothed, also wholly within the oral frame. Ventral surface of 

 head with a large, median gular fovea. 



Antennae long (0.64 mm.), the visible portion three-fourths as long as 

 head, cervicum and pronotum united; three-segmented; segment I invisible 

 from above, as usual, subquadrate (0.046 mm. long) ; II very obconical but 

 as wide as long (0.046 mm. long); III elongate-obconical (0.55 mm. long), 

 slightly arcuate, with circularly truncate and setose apex, this apical surface 

 relatively narrow, being only slightly more than one-third the width of the head. 



Pronotum transversely suboval with a large, shallow, glabrous, foveoid 

 depression at middle of base. 



Elytra with oblique humeri. Each elytron with an entire sutural stria; 

 then a row of setae; then an entire juxtasutural stria; then a row of setae; 

 then two discal striae which converge and do not extend beyond middle of 

 disc, and which enclose one or two rows of setae; then about three poorly 

 defined rows of setae; then a short, shallow, intrahumeral depression; then 

 about ten rows of setae to lateral elytral margin. 



Abdomen with first tergite partially membranous and hidden beneath 

 elytra for the most part. Five visible tergites of which the first three are visible 

 on the lateral margins by their sutures, but wholly fused between margins to 

 form a prominent dorsum. Dorsum deeply depressed in basal half and tumid- 

 convex in apical half. Fourth tergite with a small but prominent conical 

 tubercle at each latero-basal angle. Fifth (distal) tergite is vertical, sub- 

 triangular. Length ratio: 12 (dorsum)/2 (fourth)/2.5 (fifth tergite). 



Sixth sternites in a length ratio of 2/3/3/.8/.5/2 with the first and last 

 more pubescent and in lateral view the sternites form a slight arc, that is, 

 they are longitudinally concave. Sixth transversely reniform to accommodate 

 last tergite, medianly depressed near apex. 



Abdomen from a dorsal view with broadly rounded apex, which is in con- 

 trast to many clavigerine males having a tapering apex. 



Aedeagus dissected: 0.368 mm. long x 0.107 mm. wide, strongly sclerotized, 

 yellowish-brown, stream-lined. The basal portion is oval, and this tapers 

 rapidly to form the arcuate, elongate-triangular, apical portion. Dorsal surface 

 of basal portion with the oval fenestra covered by a semi-membranous, ex- 

 pansible roof. Dorsal surface of apical portion with the triangular fenestra 

 similarly covered, but medianly with a longitudinally shallow sulcus towards 

 arcuate apex. This perfectly bilaterally symmetrical penis is entirely similar 

 to the penis of Tyrini {Ceophyllus, Tmesiphorus) and is not similar to the 

 ctenistine penis. It suggests either remarkable coincidence, or relationship 

 despite the different tarsomere ratio. 



Metastemum very large and strongly tumid, without any median modi- 

 fications save that there is a pyriform patch of pubescence which projects 

 over first sternite. 



Legs all strongly macrosceline, with very long and subobconical trochan- 

 ters; short, inflated femora; long, subarcuate tibiae; tarsi with two minute, 



