136 bulletin: museum of comparative zoology. 



geniculately bent mesad and then at once again distad, the distal part flattened 

 and lanceolate in outhne. The outer branch is slender and straight proxi- 

 mally but is thin and expanded distally, its outer margin convex, the mesal 

 straight, as a whole curved mesad to touch with its tip the tip of the mesal 

 branch. 



Length, about 16 mm.; width 2 mm. 



Paurodesmus, gen. nov. 



This genus is very close in its general structure to the Palaearctic 

 Brachydesmus. Like that genus the body consists of the head and 

 nineteenth segments and the general sculpturing is as in Polydesmus. 

 It differs in having the keels more elevated, with the posterior angles 

 produced into longer and more slender processes. The body is larger 

 and darker than in that genus, more as in the usual Polydesmus 

 forms. Unfortunately no male was secured so that the character of 

 the gonopods cannot be given. 



Genotype. — P. acutangulus, sp. nov. 



367. Paurodesmus acutangulus, sp. nov. 



TiPE.— M. C. Z. 4,660. Queensland: Kuranda (H. L. Clark). 



Color dark brown above, in the middle and posterior regions of a decidedly 

 reddish tinge on keels and back of the principal transverse sulcus. 



Antennae moderately long, slender excepting the sixth article which is 

 much thickened; lengths of second, third, fourth, fifth, and sixth articles 

 respectively about .36 mm., .4 mm., 32 mm., .34 mm., and .43 mm. Vertigial 

 sulcus fine, distinct. 



CoUum equal in width to head inclusive of mandibles, obviously shorter 

 than the second tergite. Laterally subacutely narrowed, the anterior margin 

 evenly convex between the lateral angles, the caudal margin convex between 

 inner ends of keels with mesal portion straight. Anterior and lateral border 

 thin, flat or rather a httle upraised especially laterally, not distinctly margined 

 except adjacent to lateral angle a little mesad from which is a second fine 

 longitudinal sulcus; the plane area of the border is extended further caudad 

 at the middle; along the border is a series of well-separated setae, each of 

 which is borne on a small nodule. The area of the coUum behind the border 

 is divided into larger setigerous areas or low flat tubercles which form fine 

 transverse rows of which the more anterior are somewhat irregular and in- 

 complete. 



On the other tergites there are the three transverse rows of large areas or 

 tubercles as in Polydesmus, each tubercle bearing a bacilhform seta; in the 



