148 bulletin: museum of comparative zoology. 



rows of large tubercles and a row on each side, each of the four rows 

 in each tergite consisting of three well-separated tubercles. Posterior 

 angles of several plates produced. Pores on segments five, seven, 

 nine, ten, twelve, thirteen, and fifteen to nineteen not borne on 

 cones or special tubercles; each removed from margin, occurring 

 on upper surface of caudolateral lobe. Anal tergite exposed from 

 above; presenting two prominent ridges projecting caudad as rounded 

 tubercles over the small, subconical pygidium proper. Coxal pieces 

 of male gonopods small, not at all enlarged as in Lophodesmus though 

 somewhat similar in form and position; the distal element very 

 elongate, extending forward over the preceding segment and bifurcate 

 into two short branches at tip. 

 Genotype. — A. atopus, sp. nov. 



410. AiPOTROPis ATOPUS, sp. nov. 



Type.— M. C. Z. 4,600. Fijis: Lomati (W. M. Mann). 



General color of metazonites above brown. The keels below brown dis- 

 tally but fulvous in a broad band across base. Pleural region again brown 

 and the venter fulvous. Legs fulvous. Antennae with background fulvous, 

 the first four and the ultimate article tinged with brown. 



The head above level of antennae very densely finely tubercular and granu- 

 lar. In the type the left antenna greatly exceeds the right in size, the latter 

 probably a degenerated one. 



Rim of coUum narrow, lobes considerably thickened. Middle region densely 

 finely tubercular and granular; with two transverse rows of large rounded 

 tubercles of which there are four in the anterior and six in the posterior. 



Keels of other tergites typically trilobate laterally; in the posterior region 

 the most posterior of these lobes is separated off by a deeper incision and shows 

 a tendency to subdivide as it does essentially on the three segments preceding 

 the ultimate. On the caudal margin of each keel in all but several of the 

 most caudal segments are three lobes, decreasing in size mesad, ectad of the 

 outer longitudinal row of large tubercles the caudal one of which on each 

 tergite projects as a lobe from the caudal margin; between the lateral row of 

 tubercles and the corresponding submedian one are two weaker crenations on 

 the caudal margin and also two between the two submedian rows. At the 

 base of each caudolateral lobe on the porigerous segments a large special 

 tubercle excepting on the seventeenth, eighteenth, and nineteenth somites 

 on which the pores are more widely removed from the margin. Beginning 

 with the sixteenth segment the caudolateral corners of the keels are produced 

 more and more caudad, the processes of the twentieth extending straight 

 caudad and distally narrowly rounded. 



