570 Mr. D. Sharp and Mr. F. Muir on the Comparative 



tube {a) into which the two ducts lead. In the absence 

 of knowledge as to the development it is not advisable to 

 attempt an explanation of this form, but it appears to be 

 not improbable that it may represent the stenazygos. 

 The student will in looking at this figure recollect that 

 the part of the sac that is the more anteriorly placed is 

 really the apical part; the sac in Cerambycidae being 

 completely inverted, the junction of the ducts with the 

 sac is really the apical, or distal, portion of the genital 

 tube. 



Family ANTHRIBIDAE. 



Form examined : Phlocohius altcrnans Wied., India. 

 Figs. 225 and 225a PI. LXXVI. 



Phlocohius altcrnans (PI. LXXVI figs. 225, 225a). 



Median lobe forming a short, flattened tube ; the ventral and dorsal 

 edges of median orifice pointed, the ventral projecting beyond the 

 dorsal, the orifice thus forms a slit extending back along the sides ; at 

 the base the median lobe is prolonged into a pair of long, thin struts 

 (ms). Tegmen forming a ring with dorsal cap-piece and a ventral 

 strut, the cap-piece having a ridge across where it becomes more 

 strongly chitinised, and at the tip bearing long hairs. Internal sac 

 large, having a large diverticulum, and at its apex a membranous 

 flagellum-like organ. 



The few other Anthribidae that we have examined are 

 all on the same type although the details differ. 



Family CURCULIONIDAE. 



Forms examined : Euphohis chevrolati Guer., New 

 Guinea. Polyclcis plumbeus Guer., S. Africa. Brachycerus 

 aptenis L., S. Africa. Belies hidentatus Mad, Australia. 

 Mecocorymis loripcs Chevr., E. Africa. Sphenophorus 

 ohscurus Boisd., Hawaiia. 



Figs. 222, 223 and 224 PI. LXXVI. 



Eupholus chevrolati (PI. LXXVI figs. 222, 222a). 



Median lobe a short flattened tube, with ventral edge of median 

 orifice projecting beyond dorsal edge, and pointed ; from each side of 

 base projects a long median strut (ms). Tegmen forming a ring-piece 

 with a pair of delicate, but quite distinct prolongations on the dorsal 

 aspect, and central strut on the ventral aspect. Internal sac long, 



