98 KECOKKS OF THE ATSTKAEIAX MUSKU.M. 



Ground colour very dark, blackish ; carina:! orange-yellow ; 

 two narrow dorsal yellow bands divided by a reddish-brown 

 line begin at the posterior margin of the first segment and run 

 tlii'ough to the apex of the last segment. Ijegs brownish, 

 growing darker towai'ds the end. 



Head smooth, except behind the labrum where the face is 

 pilose and sometimes uneven, and also occasionally above the 

 antennae, where some tiny wrinkles may be seen ; surface 

 rather swollen behind the antennae, wherefrom the vertex 

 appears flattened ; median sulcus wide in the middle, linear 

 backwards and between the antennae, where it disappears 

 abruptly. Antennte standing close together (0.80 m/m apart), 

 long and slender, I'eaching the posterior margin of the third 

 segment ; pilose fi'om the second joint, more densely towards 

 the apex, Avhich bears four sensory cones. Micrometrical 

 measurements of the joints : 1st, 0.50 m/m ; 2nd, 1.25 mm ; 

 3rd, 1.20 m/m; 4th,' 1.15 m/m; 5th, 1.10 m/m; 6th, 0.95 

 m/m ; 7th and 8th, 0.15 m/m ; total length: 6.30 m/m. 



Integuments smooth and scarcelj- shining, with more or less 

 distinct, irregular, mostly branched strife, lacking orientation, 

 and, towards the postei'ior end of the body, with some irregular, 

 longitudinal wrinkles. First tergite with a vague transverse 

 median impi'ession ; anterior mai'gin straight in the middle, 

 oblique on each side ; posterior margin scarcely ccnicave ; 

 posterior angle rounded, with a marginal t'uri'ow. Second 

 tergite with small but well characterized, sloping keels reach- 

 ing below the posterior angle of the tirst tergite; margins 

 raised, causing the surface to appear hollow ,- anterior angle 

 rounded ; posterior angle slightly produced and rounded. 

 From the tliird segment the keels are considerably reduced and 

 located rather low ; antei-ior angle entirely rounded ; ])osterior 

 angle not produced beyond the level of the posterior margin of 

 the segment, yet somewhat acute owing to the fact that the 

 posterior margin is slightly excised ; suture beset with a row 

 of veiy Hue granules. Fi'om ihe fifth segment to tlie seven- 

 teenth, the metazonites are divided into two subequal halves 

 by a distinct transverse furi'ow. Poi'es opening sideways near 

 Ihe postcrioi" angle of the keels of the segments 5, 7, 9, 10, 12, 

 l.'i, 15 1o 19. Last segment gradually narrowed, with apex 

 truncate, smooth. Valves, globular, smooth, with shilling, 



