Anatomy of the Male Genital Tvhc in Coleoptera. 549 



Blaps similis. 



Is of the same type, the median lobe being small but distinct, the 

 lateral lobes small, consolidated along the basal half, thus foi-ming a 

 triangular dorsal plate, split from the apex to half way to the base. 



CossypTiui^ insnlaris (PI. LXVIII figs. 166, 166r/). 



Of the usual Tenebrionid type, but the median lobe greatly 

 reduced and forming a small membranous lobe on which the median 

 oritice is situated. No differentiated sac. 



Stenods a.ngastata (PI. LXVIII fig. 167). 



Median lobe well developed, with two median struts. Lateral 

 lobes consolidated and forming a long, narrow, nearly parallel-sided 

 ventral trough in which the median lobe lies, truncate and slightly 

 curved at tip. Basal -piece forming a ventral trough-shaped sclerite, 

 membranous on dorsal aspect. 



The fact that the tegmen lies on the ventral aspect of the median 

 lobe seems to differentiate this type from the former, but we 

 here repeat that we have several times remarked as to the difficulty 

 attending the orientation of the dorsal and ventral aspects of the 

 aedeagus. 



Zophero&is gcorgii (PI. LXVIII fig. 168). 



Median lobe long and narrow, chitinous at tip and along the 

 sides, membranous along the median dorsal and ventral portions ; 

 median orifice near tip on dorsal aspect. Tegmen forming a large, 

 nearly parallel- sided trough in which the median lobe lies, the distal 

 half formed of the consolidated lateral lobes, truncate at tip and 

 bearing fine hairs, the basal half formed of the basal-piece. 

 Internal sac undifferentiated. 



This type appears to come near to Stenosis. 



Pcdiris sp. ? (PI. LXVIII fig. 162). 



Median lobe thin and pointed, the tip curved slightly down- 

 ward, the median orifice on dorsal face near base. Lateral lobes 

 long, slender, studded with small spines along the distal half with 

 the tips spatulate. The lobes are quite free but their lateral 

 edges touch on the dorsal face (in fig. 162 they are parted to show 

 their freedom). Basal-piece large, forming a ventral sclerite with 

 its lateral edges turned in, the dorsal face is membranous (»i), 

 there are two sclerites in the middle of the membrane (a) whose 

 distal ends are articulated to the base of the lateral lobe. 



In a similar species from the same region (Geelvink Bay) the 



