310 ERNEST WARREN. 



while in the male, wlien the genital apparatus is not extruded, 

 it does not reach beyond the hinder third of it (PL XVI, 

 figs. 1-3). 



If we accept Yerhoeff's numbering of the segments of the 

 abdomen of Coleoptera the up-bending appears to be in 

 the 3rd segment. 



DniENSioxs. — The female is somewhat larger than the male 

 and the abdomen tends to be more inflated. 



(1) Total length (= distance from the nearly vertical 

 surface of head to the hindermost end of the upturned 

 abdomen), mean, 2'52 mm. in male and 2"98 mm. in female. 



Largest male 2"95 mm., largest female 3'60 mm. 



(2) Grreatest vertical height of upturned abdomen, mean, 

 0'83 mm. in the male and 0*98 mm. in the female. 



Colour. — The chitinous parts of the head and thorax are 

 pale yellowish brown. The abdomen is translucent and 

 whitish save for the sternites on the upper surface, which 

 are yellowish, and the tergites on the lower surface, which 

 are of a rich, yellow-brown. Tergites A^II and VIII occur in 

 the form of wide, shield-shaped, thin sheets of chitin and are 

 pale yellow. In addition near the morphological posterior 

 end of the abdomen there are two rounded indistinct pale 

 yellowish areas on the dorso-lateral surface (PI. XVI, 



Head. — Viewed from the front the downwardly directed 

 head (fig. 4) is Avidely ovate, narrowing below. Labruni 

 narrow, bilobed, setose ; upper edge carries an internally 

 projecting thickened ridge of chitin. Lower portion of 

 clypeus membranous with an indistinct small spot (possibly 

 a sense-organ) on each side; upper portion chitinised and 

 slightly setose. Frons and vertex continuous, wide, slightly 

 concave, almost glabrous, bearing antennal pits internal to 

 the eyes close to anterior border. Pits have thickened edge 

 indented below. At the junction of the frons and clypeus 

 there is an internally projecting ridge continuous with the 

 tentorium. Occiput with a concavity on each side and a 

 aiarrow, median, posterior groove. Eyes of moderate size with 



