Anatomy of the Male Genital Tube in Coleoptera. 497 



This is a highly developed form of the Aleocharid type. 

 The structure is very large in comparison with the size of 

 the insect. 



Homalota londiiicnsis. 



Median lobe broad and flattened ; tip on ventral aspect curved 

 downward, and drawn out into a fine point, tipped with a fine 

 pin-head knob. Lateral lobes large and broad ; on the lower 

 margin, near base, arises a long curved flattened spine. Sac not 

 examined. 



Homalota elongatida. 



Median lobe bulbous at base, membranous on dorsal side, 

 cbitinous on ventral, the distal chitinous edge prolonged into a 

 laterally compressed curved tip. The lateral lobes large, flat, and 

 rounded at apex. 



Homalota paveois. 



Median lobe swollen at base, chitinous on ventral side, mem- 

 branous on dorsal, distal end not twisted. Lateral lobes large. Sac 

 not examined. 



Tachinus suiter rancvs (PI, LII figs. 61, 61a). 



Median lobe sliort and bulbous, the ventral aspect formed by a 

 chitinous sclerite jointed at apex, the dorsal by a circular sclerite, 

 with a semi- membranous connection between (in). The median 

 orifice has a dorso-distal position and the median foramen is small 

 with a ventro-inedial position. The lateral lobes joined together to 

 near tips, attached to median lobe near median foramen on 

 posterior (ventral) side. Internal sac large and complex, with a 

 flexible, chitinous sclerite (a) supporting each side ; at the distal 

 end there is a large egg-shaped chitinous body (6) with a short 

 tube on one side on which the ejaculatory duct opens. The use 

 of this hollow egg-shaped body we are unable to conjecture. 



Tachiiioderus grossidus. 



Distal half of median lobe tubular, basal half bulbous; median 

 orifice distal ; median foramen on ventral aspect in median position ; 

 semi-membranous around middle portion of bulbous base. Lateral 

 lobes small, amalgamated to near tip. Internal sac large, with 

 bilobed diverticulum on ventral face, and small chitinous process 

 at apex where the ejaculatory duct opens. 



