480 Mr. D. Sharp and Mr. F, Muir on the ComjMrative 



III. MORPHOLOGY. 



A. Special Anatomy. 



Family CICINDELIDAE. 



Forms examined : Manticora tuberculata Deg., S. Africa. 

 Omus californicits Esch., N. America. Cicindela tortuosa 

 Dej., N. America. Therates lahiatus Fabr., New Guinea. 

 Tricondyla aptera 01., New Guinea, 



Figs. 29-31 of PI. XLVII. 



Manticora tuberculata (PI. XLVII figs. 31, Sla, Slh) . 



Median lobe curved, tubular ; median orifice at distal end on ventral 

 side, about one-fifth the length of lobe ; median foramen at basal end, 

 as large as circumference of lobe ; dorsal edge forming a projection to 

 which lateral lobes are articulated. Lateral lobes broad at base, with 

 slender, free tips. Basal-piece shield-shape, connected to lateral lobes 

 by a curved band broader in middle ; the lateral lobes are slightly 

 asymmetrical and the distal end of each lobe lies on the left side of 

 the median lobe. The internal sac is nearly as long as the median 

 lobe ; at the point where the ejaculatory duct enters the sac there is 

 a small chamber with chitinous walls (fig. 316) drawn out into a 

 long, slender flagellum, with the external opening at its tip. Only 

 the baso-dorsal part of the sac is evaginated, as a tongue, with 

 the lateral edges turned down to form a groove, along which the 

 flagellum jjasses (fig. 31a); the rest of the sac is crushed up like 

 a concertina and the flagellum is pushed out. 



Omus californicvs. 



Median lobe as in Cicindela but irregular in outline ; basal half 

 of lateral lobes wider than in Cicindela, distal half tapering to a 

 point. Basal-piece forming a thin V-piece on ventral side of median 

 lobe. Internal sac well developed, a thin, long, curved chitinous 

 spine rising from the apex. 



Cicindela tortuosa (PI. XLVII fig. 30). 



Median lobe curved, tubular, swollen along the distal two-thirds ; 

 median orifice forming a slit along ventral side of the distal fourth 

 of lobe ; median foramen at basal end. Lateral lobes slender, two- 

 thirds as long as median lobe. Basal-piece V-shaped, connected to 

 lateral lobes about one-third from their base. Internal sac large, 



