HANSEN, II. .!.: HEMIMERUS TALPOIDES WLK. 67 



as broad as long, with the low posterior side faintly excavated, 

 and broadly rounded in front. Eyes are completely wanting. 

 On the upper side (PI. 2, fig. 3) is seen anteriorly in the middle 

 of the front a portion of the almost vertical, broad labrum (c), 

 at its lateral angles the superior lateral portion of the mandibles 

 (d), behind these their articular membrane i^f), and a little more 

 l)ackv,ards on the lateral margin the articular membrane (b) of the 

 antenna. 



The antennae (PI. 2, fig. i, PI. 3, fig. i) are rather short, 

 about as long as the greatest breadth of the head, situated on 

 its lateral margin half-way between its posterior angle and the 

 labrum. They are inserted in that manner, that in front of their 

 basis is found a rather large articular membrane, forming on the 

 upper side of the head a smaller, on the lower side a greater 

 triangle (PI. 2, fig. 4, b); behind this in.sertion the lower side of 

 the head is somewhat excavated along the prominent lateral 

 margin (PI. 2, fig. 4\ so that the peduncle of the antenna can 

 l)e laid back in this excavation and the flagellum be hidden be- 

 neath the lateral portion of the prothorax. Each antenna consists 

 of a stouter, 2 -jointed peduncle and a more slender, 9-jointed 

 flagellum, which is but half as long again as the peduncle. The 

 basal joint of the peduncle is more than twice as long as and 

 somewhat stouter than the 2nd joint; the transverse section is 

 triangular with the corners somewhat rounded. In the flagellum 

 the 3 proximal joints are a little more slender and much shorter 

 than the others, which are of almost the same length ; the last 

 joint is somewhat acuminated. While the joints of the peduncle 

 sliow but a lesser number of spread setules, the joints of the fla- 

 gellum are trimmed with numerous setules, and besides on the 

 anterior side near the apex of each is found a flat area set with 

 numerous, short, tenon-like sense-seta;, projecting from round holes 

 of rather different size (PI, 2, fig. 5, s). 



The labrum (PI. 2, fig. 2 and 4, c; fig, 6) occupies, as 

 said before, a great portion of the anterior margin of the head, 

 so that it is seen both from above and from below. It is some- 

 what arched, almost rectangular, with rounded lateral inferior cor- 

 ners, and almost 2 V2 times larger than long. The inferior free 

 margin is in some distance from the median line provided to an 



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