388 ENTOMOLOGICAL NEWS. [Nov., '14 



without keels or cornicles. A very short but sharply impressed median 

 longitudinal furrow immediately cephalad of the caudal margin. 



Ventral plates with two distinctly impressed longitudinal sulci which 

 in the anterior region mostly cross the entire plate but caudad may 

 extend only one-half to three-fourths the length. Without pits; but 

 some of the plates showing a transverse depression or furrow between 

 the middle and the caudal margin. 



Last ventral plate strongly narrowed caudad. Caudal corners ob- 

 liquely excised. Caudal margin incurved. 



First 15 pairs of legs with 2 tarsal spines ; sixteenth to nineteenth 

 with i tarsal spine ; the twentieth with none. 



Coxopleural process short, subtriangular ; terminating in 4 points 

 or spines. A single lateral spine; none dorsally. 



Length about 27 mm. 



Locality. Malay Peninsula : Johore State. 



(Taken January 10, 1907.) 



This species stands closest to 0. scaber Porat, occurring in 

 China, Siam and the Nicobars, and O. insularis Haase, known 

 from Ceylon and the Seychelles. From the former it is read- 

 ily separated in having 2 tarsal spines on the first 15 pairs of 

 legs instead of on the first 7 only, etc. ; and from the latter in 

 having no tarsal spine on the twentieth legs, in having fewer 

 pairs with 2 tarsal spines, in having the antennae 21 -jointed, 

 etc. 



6. Otostigmus moluccanus sp. nov. (PI. XVII, figs. 6, 7). 



Olivaceous, with the head and first few plates somewhat paler. 



Head and first dorsal plate finely and uniformly punctate. 



Articles of antennae 18. The first 2 or 2 ! 4 glabrous and shining. 



Dental plates moderately long, the lines setting them off meeting at 

 an angle. Teeth 3 plus 3, of which the outermost on each side is 

 separated by a wider and deeper interval from the median one, than 

 the latter is from the most mesal, the median and most mesal being 

 fused nearly to their apices. 



Dorsal plates from third to fifth caudad margined. A median keel 

 only obscurely indicated. Lateral portion of plates in caudal region 

 weakly longitudinally rugose ; only finely and weakly scabrous. 



Last dorsal plate subangularly bowed out, with a conspicuous median 

 longitudinal depression immediately in front of the caudal margin. 



Ventral plates with distinct paired longitudinal sulci extending 

 mostly about two-thirds the length of the plate or very nearly so. In 

 addition to the paired sulci there is a median longitudinal sulcus or 

 furrow distinctly impressed on the anterior portion of the plate, espe- 



