398 



neath ; antennae and legs ochraceous ; anal valves with ferruginous tinge. 



Head smooth and shining , the vertical sulcus obsolete in the middle, 

 visible above and deep below; two punctures on each side of the la- 

 brum. Eyes large composed of upwards of 40 ocelli arranged in 6 

 transverse series; the distance between them equal to about a dia- 

 meter and a half. 



Antennae long, considerably longer than the head, the two distal 

 segments hairy. 



First tergite with its lateral angle acute and narrowed, the apex, 

 however , rounded , with only an anterior marginal sulcus. The second not 

 or hardly projecting below the level of the first. The rest of the somites 

 without the scobina, the transverse sulcus obsolete above, visible at the 

 sides , the middle of each somite depressed , i. e. lower than the an- 

 terior and posterior portions, the posterior portion smooth or finely 

 rugulose and polished, the anterior portion also smooth. The pores 

 minute, above the middle of the side, behind the transverse depression 

 of the somites but just upon the superior termination of the lateral 

 sulcus. Anal somite smooth, angled above, the angle covering the 

 valves but not surpassing them, not constricted at the base; the 

 valves with their margins somewhat strongly compressed. 



Legs long and without pads. 



Copulatory feet as figured. 



Number of somites 48. 



Length 53 mm.; width 4. 



Spirobolellus nov. 



Species of small size , longitudinally banded with pale colour. 



■Eyes large, subcircular, widely separated. 



Antennae short, 1 st segment as large as the 2 nd (? always). 



Frontal sulcus weak. 



Lahr at pores 4 + 4. 



Collum large, extending laterally as low as the 2 nd . 



The transverse sulcus obsolete at least dorsally, its place taken 

 by a groove which is situated in front of the pore and gives the 

 appearance described as the pore being situated behind the sulcus; 

 the area behind the groove elevated. Sterna striate. Scobina absent 

 (? always). 



Last segment of the legs not padded in the rf . 



