704 MYKIAPODA FROM AFlUt'A — COOK. 



CTENOiULUS, iivu. iiov. 

 Odontopyge of von roiath (i)rol)ably), not of Biaiult. Peters, autl Karsch. 



Body of moderate .size, about 15 tiiiies as loii«> as broad, cylindrical, 

 narrowed, aud slightly compressed posteriorly. 



Covered portion of vertex with transverse and longitudinal striatious. 



Clyi)eus witli two rows of setigerous i)unctations immediately above 

 the labrum. 



Labrum with shallow emargination and blunt teeth, which project 

 nearly as far as the edges of the labrum outside the emargination. 



Eyes pointed-oval or triangular-crescentic, distant from each other 

 by more than the transverse diameter of one of them; ocelli 40-80 in 

 number. 



Antenn;e subclavate, moniliate, second joint longest, followed by the 

 third, sixth, fourth, fifth, first, and seventh; eighth joint distinct; 

 olfactory cones large, widely separated. 



Mandibulary stipe with exposed surface convex, subrectangular ; 

 margin plane or elevated. 



Masticatory plate rounded triangular, about twice as long as broad, 

 divided into a flat triangular, roughened surface with a raised margin 

 and a broad groove. 



Mandibulary tooth large, triangular, with rounded apex, about twice 

 as long as the breadth of base. 



Dentate lamella with five blunt teeth. 



Pectinate lamellai, nine. 



Hypostoma more or less arcuate, the ends enlarged and with a 

 chitiuized projection on the x>osterior edge. 



Mentum of male with the ends verj^ narrow, that of the female 

 oblong. 



Promentum semi-elliptical triangular, broadest behind, rounded in 

 front; a narrow x^osterior portion with the surlace plane, the larger 

 anterior part concave, with a distinct line of demarcation. 



Cardo small, subtriangular. 



Stipe between two and three times as long as its greatest width. 



Lingual lamina subeqnal in length with the promentum, half as 

 wide as the stipe. 



First segment with the lateral lobes rounded or somewhat truncate, 

 with one or two oblique striations. 



Anterior subsegments concentrically striate anteriorly, aud with 

 scattered granules along the striations. 



Posterior subsegments finely, longitudinally rugulose; coarser stria- 

 tions on the lateral and ventral surfaces. 



Sui>i)]ementary margin regularly pectinate. 



Kepugnatorial jiores beginning on the sixth segment, absent frcm 

 the last two segments and sometimes from the fourth from the last; 

 pores located near the middle line of side. 



