12 bulletin: museum of comparative zoology. 



tance of distal edge of base of spine from proximal end of article to total 

 length of article as 11:25 whereas in micrsi it is as 11:31). Anal 

 legs shorter. The strongly chitinous anterior edge of prosternum 

 convex on each side, slanting a little caudad of ectad away from 

 middle, its outer end elevated, dentiform, or not. 



Length, 42 mm., being thus considerably smaller than the average 

 adult miersi. 



Otostigmidae. 

 21. Otostigmus glaber, sp. nov. 



Type.— M. C. Z. 1,933. Paratypes.— M. C. Z. 1,934, 1,938, 

 1,949, 1,990, 2,019. Fijis: Lakeba Lau, Nansori, Nadarivatu, 

 Lomati, Vanua Ava (W. M. Mann). 



Color above, green, nearly uniform; antennae often distally fulvous. 



Dorsal plate very finely and densely punctate. Antennae con- 

 sisting of eighteen articles of which the first two and a half are glabrous. 

 Dorsal plates from the fifth inclusive on with complete paired sulci. 

 Eleventh dorsal plate margined, twelfth less completeh^ so, others 

 margined more or less completely, the twenty first most sharply so. 

 All dorsal plates wholly smooth and shining, without trace of keels 

 or tuberculation. Last tergite with a median longitudinal depression 

 in front of the caudal angle. Prosternal dental plates each with four 

 primary teeth of which the three innermost of each are fused excepting 

 distally, the ectal one free and notched distally ; sometimes only three 

 teeth, with two innermost fused. Anterior ventral plates with sulci 

 only across anterior border; but in the middle and posterior regions 

 the sulci extend caudad to or beyond the middle of plate. Last ven- 

 tral plate narrowed caudad, sides nearly straight, caudal margin 

 weakly incurved, caudal corners rounded. Coxopleurae with long 

 processes which exceed the last ventral plate by much more than 

 their length; distally w^ith two spinous points, laterally with two or 

 three and dorsally with two (one on ectal and one on mesal edge), 

 or often with but one. From first eight to first eleven legs with two 

 tarsal spines, or some intermediate ones beyond the fourth with but 

 one, the others to the twentieth inclusive with but one spine. Femur 

 of the anal legs ventrally on ectal side with five to eight spines, ven- 

 trally toward mesal side with three to six, on mesal surface with a 

 series of two to four stouter spines, and on mesodorsal edge with two 

 (or three) spines in addition to the one at the distal angle. 



Length, 35 mm. 



