510 ME. F. U. SINCLAIR ON THE [Dec. 3, 



latter forming oue curve with sides of tergite. Anterior border 

 nearly straight, sides of tergite rounded ; anterior edge raised 

 into a ridge along which a row of tubercles is arranged, the 

 ridge is carried round I he side of the tergites; posterior margin 

 with eight tubercles arranged in a row ; at the lateral margin 

 there are more tubercles, but flattened and irregular. The 

 surface of the tergite is covered with smaller tubercles arranged 

 irregularly, and there is an irregular transverse row of some larger 

 tubercles. 



2nd tergite is narrow and curved forward and downward, the 

 edge of the keel being rounded. 



3rd tergite does not project so much downward and forward ; 

 the anterior and lateral margins meet so as to form a fairly acute 

 point, the posterior margin rounding-off into the lateral. 



■1th tergite. Anterior margin nearly straight ; forms a subacute 

 angle with the lateral, the posterior forming an obtuse angle with 

 the latter. On this tergite one can see the first beginning of the 

 basal shoulder. 



bill to 10 th tergites : the angle formed by the anterior and 

 lateral margins becomes gradually more of a right angle. 



11th tergite. From the 11th tergite the posterior angle begins 

 to project, and at the 15th it has the form of a spine. 



12th tergite. From the 12th the lateral edge of the keel shows 

 signs of being lobed. 



16th tergite. At this somite the lateral edge of the keel shows five- 

 lobes, which are distinct on the 17th. The last three tergites show- 

 three rows of tubercles ; on the 15th the third row becomes con- 

 fused with the smaller tubercles which cover the surface, but the 

 two posterior rows may be traced more or less easily up to the 

 first. 



The stigmata repugnatoria are placed nearly in the middle of the 

 keel at a distance of about 2 diameters from the edge. 



The anal plate is rounded posteriorly, and shows six raised longi- 

 tudinal ridges differing in length and arranged symmetrically. 



The sub-anal plate is triangular, and is armed near the apex with 

 two long papilla?, each of which bears a long seta. The edges of 

 the anal valves are not very strongly marked, and have two pairs 

 of setiferous tubercles near the margins. Outside of the valve are 

 two more setiferous tubercles, arranged symmetrically with the 

 internal ones. 



Sterna are coriaceous, and without spines or furrows. 



At the base of each leg there is one tubercle on the internal 

 side and two on the external side. In the anterior region of the 

 body these tubercles (the external ones) show an irregularity of 

 arrangement ; the two posterior ones are arranged in a straight line 

 from the base of the leg to the under surface of the keel ; the 

 anterior two are arranged parallel to a line connecting the bases of 

 the legs. 



The legs and antennae are hairy. 



Another specimen is 82s| mm. long and 12| mm. broad. 



