134 bulletin: museum of comparative zoology. 



Anal tergite narrowed caudad into cauda of usual form, with trans- 

 verse series of setae above. Coxae of male gonopods large but mostly 

 concealed in lateral view. Telopodites long, split from distal end to 

 near middle of length into three branches, the middle (seminiferous) 

 of these longest, slenderly tipped, branches not coiled. 

 Genotype.^ — Tasmanodesmus hardyi, sp. nov. 



365. Tasmanodesmus hardyi, sp. nov. 



Type.— M. C. Z. 4,643. Tasmania (G. H. Hardy). 



General color throughout dull brown. Legs a somewhat paler brown. 



The head over the vertigial and frontal region uneven, with weak tuber- 

 cular elevations and corresponding depressions; hairs straight, finely tipped, 

 numerous. 



Surface of first tergite also obscurely roughened; with numerous setae, 

 like those of the head, arranged in transverse series. Anterior margin forming 

 an even convex curve from one caudal margin at middle a httle incurved. 

 Keels not serrate. Keels of second tergite with caudal corners subrectangular, 

 a small tooth at anterior corner, one near middle of side and one between these 

 two, the two caudal teeth bearing each a sliort seta, a similar seta also at caudal 

 angle. Keels of third tergite like those of the second, as are also those of the 

 fourth excepting that the posterior angles are a httle produced and some- 

 what less than rectangular while the anterior marginal tooth is more reduced. 

 On the fifth keels the posterior angles are still more produced and more acute; 

 the lateral serrations are weaker and more widely separated, the most anterior 

 one smaller or nearly obHterated and another tooth evident nearer caudal 

 corner. This extra posterior tooth evident on succeeding porigerous keels 

 but not on the non-porigerous. In the posterior segments the teeth are weaker 

 and often scarcely detectable. The angles become more and more produced 

 and acute caudad. 



Anal scutum with five transverse rows of setae each of which arises from a 

 small tubercle. Valves with mesal borders a httle elevated, not set off with 

 distinct sulci; each with two long setae. Anal scale triangular with caudal 

 end truncate, bearing two long setae. 



Legs long; the tarsi specially long and moderately curved, much exceeding 

 any other joint in length. 



In the telopodite of the male gonopod the ectal process is slender and 

 acutely pointed, only slightly curved; the mesal branch is a little longer than 

 the ectal, broader, blade-hke, and with distal end truncate or a httle concave; 

 the principal processes extending cephalad much beyond the other, near level 

 of distal end of the mesal process geniculate, the end portion acute and ex- 

 tending cephalomesad to nearly meet the one of the other gonopod. 



Length (male), near 24 mm.; width, 2.8 mm. 



