TIIK \IYi;iAI'iM>.\ l\ TllK A I'S Ti; A I.I.W Ml'SFOrM — lUtOLRMANN. 148 



Scobiuiis iVotii tlu' t'iii-litli st'L;'in('nt ti> iilxuit tlic tweiity-Hftli, 

 located so close to the autei'ior margin of tlie zoiiite, that iliey 

 miiiflit be mistaken for siiiuations of the marfj^in. Dimple 

 (PI. xviii., tig'. 70) open anterioi'ly, very wide; tlie posterior 

 field conic rounded, with compai'atively few strife (about ten). 

 The space between tlie dimples not iMryer tlinn t he diameter of 

 one of them. 



First segment with scai'cely distinct leathery surface, falling 

 shoi't of the veiiti'al sui'face of the second segment; sides 

 rounded; marginal sulcus very shallow; a secondary verj- 

 shallow, incomplete sulcus is seen above the mai-ginal sulcus 

 (mav be accidental, see female). Ventral surface of second 

 segment neither concave nor swollen laterally, but crossed by 

 well marked longitudinal sulci, four of Avhich reach above the 

 level of the angle of the preceding tei'gite. 



Anterior concealed part of the jii'ozonite of the following 

 segments almost smooth, or at least without concjeutric striae. 

 Posterior part of prozonite striate ; the strife straight dorsally, 

 growing more oblique laterally, and arched on the level of the 

 pores; they again become straight below the pores, encroaching 

 on the metazonite and reaching its posterior margin. The 

 dorsal part of the metazonite (PI. xviii., tig. 71) is slightly 

 raised, /.r., not on a level with the pi'ozonite. It is crossed 

 longitudinally by some fifteen (on the eighteenth segment), 

 wide and deep grooves, more deeply impressed and closer 

 together on the middle of the back than above the pores, the 

 outer grooves being similar to the sulci below the pores. The 

 grooves are not, well outlined, their margins die away in the 

 surface of the metazonite which is convex between the grooves. 

 Sutural sulcus obsolete din-sally, scarcely marked on a level 

 with the pore and below it ; it is notched behind the pore, 

 partly surrounding a feebly raised circular area in the middle 

 of which the small pore is cut open. The latter is located 

 I'ather high in the sides. It begins with the sixth segment. 

 The second and third segment show no dorsal grooves ; these 

 are rare and weak on the fourth segmeiit, but i-apidly become 

 moi'e numerous ami deeper backwards. 



Last segment rather long ; its posterior margin is angulai' 

 and just covers the upj)er angles of the valves. Valves promi- 

 nent, somewhat globulai' at the base, compressed near the 



