( 556 ) 



lower angle of tlie upper lobe of this segment is very little produced and much more 

 broadly rounded off than in the ? described above. The lobe of the right side bears 

 an additional small lobe ventrally, which is absent from the lobe on the left side. 

 Tlie ventral lobe is shorter than in the true ? of li/cosius, and the bristles in front 

 of the row on the seventh sternite are more numerous (nineteen on the two sides 

 together). The eighth tergite has above the row one long bristle and three small 

 ones on one side and five small ones on the other, there being five bristles on the 

 inner surface on each side. The anal sternite has ten bristles. The receptaculum 

 seminis resembles that of Cf. eiigis in the head being shorter than the tail, 

 though the head is not quite so short as in enyis. Tlie specimen possibly represents 

 a distinct species. 



28, Ctenophthalmus cophurus spec. nov. (text-figs. 27 and 28). 



Head. — The first spine of the genal comb is slender and, like the third, sharply 

 pointed, the second spine being the broadest and having an obtuse apes. The 

 genal process is narrower than usual, which is particularly noticeable in the ? , in 

 which sex the width of the process does not much exceed that of the second genal 

 spine measured in the centre ; the upper edge of the process, moreover, is not 

 distinctly elbowed, as it is in the ? ? of most other species. 



Thorax. — The third spine of the comb is half as long again as the pronotum. 

 The lobe below the comb is narrow, its diameter being equal or inferior to the 

 distance from the lower edge of the second spine to the upper edge of the third 

 measured in the middle. The mesonotum bears two rows of bristles, a few additional 

 dorsal bristles and a series of small basal ones. This latter series only extends as 

 far as the fourth pronotal spine, there being consequently a lateral area on the 

 mesonotum between the basal edge and the two rows of bristles which is devoid of 

 bristles. The mesopleura have seven bristles, the metepisteruum has two, and the 

 metepimerum si.\ to nine, usually seven. 



Abdomen. — The tergites bear two rows of bristles, the first tergite having a few 

 additional dorsal ones. The first bristle of the second row, and on the second tergite 

 also the first of the anterior row, are placed below the stigma. The basal sternite 

 has no lateral bristles in either sex. The sternites of segments III to VI have in the 

 S a row of six to eight bristles on both sides together, and two to six smaller 

 bristles in front of the row, the numbers being slightly larger in the ? and the 

 bristles rather stronger. 



Legs. — The apical ventral bristle on the inner side of the hiudfemur is short. 

 The longest apical bristle of the second hindtarsal segment reaches a very little 

 beyond the apex of the third segment. The fourth segment of the same tarsus is 

 half as long again as it is broad, and the fifth bears as a rule three lateral plantar 

 bristles on one side and four on the other, the right and left hiudtarsi usually differ- 

 ing in these bristles. The proportional lengths of the hindtarsal segments vary 

 slightly, being usually in the 6 30, 27, 17, 10, 17, and in the ? 44, 28, 18, 10, 18. 



Modified Segments. — c?. The eighth sternite (text-fig. 27, VIII. st.) is 

 ventrally produced into a rather narrow lobe which is very feebly chitinised, being 

 vitreous from the most distal bristle and membranous at the apex. The segment, 

 bears about a dozen bristles, of which the four to six distal ones are long. , The 

 process P of the clasper is broad and rounded, being convex dorsally and somewhat 

 incurved ventrally. It bears a transverse row of usually four long bristles, seldom 

 one or two more, the ventral bristle being accompanied by a smaller bristle and the 



