NEW SPECIES OF BRAXCHINECTA LYNCH 557 



closely set papillae, flat on top, which give the area they cover a 

 tessellated appearance (pi. 80, figs. 5, 6). The papillae are Sjx to O/i 

 high, 20/i to 30;u, in diameter, and are separated by spaces 2ix to C/x 

 wide. The flat upper surfaces of the papillae have a distinct over- 

 hang toward the proximal end of the antenna. In end view the flat 

 surfaces appear to be pitted with minute pores, which, however, aro 

 probably spaces beneath the surface of the papillae. 



The anterior and lateral sides of the distal fourth of the basal 

 article of the antenna are covered with closely set papillae of hemi- 

 spherical shape, mostly 7/* to 15/a in diameter and Ifi to 11/x high. 

 Scattered among them are pointed sensory hairs averaging 80ju, in 

 length. Toward the proximal end of the basal article these papillae 

 are arranged as scattered and widely separated groups of circular 

 outline, QOfi to 200ju, in diameter, with a hair in the' center of the 

 group. Toward the periphery of such groups the papillae become 

 lower and broader (pi. 78, fig. 3). 



The uniarticulate antennae of the female are tusklike in appear- 

 ance and exceptionally long. About three-fourths of the distance 

 from the origin of the antenna to its distal end there is a slight swell- 

 ing, distal to which the antenna tapers more abruptly and presents a 

 feeble sigmoid curve. The terminal portion of tlie antenna is rough- 

 ened by low ridges or curved welts, 4/* to 5/a high and 15/^ to 45/t in 

 length. In the region of the swelling of the antenna, just proximal 

 to the narrower distal portion, these ridges become transformed into 

 numerous crowded papillae of hemispherical shape, 5/* to 12/x high 

 and lljtt to 18/t wide. These papillae cover the median and anterior 

 sides of the antenna in this region. Interspersed with the papillae 

 are numerous sensory hairs, 30/* to 75/a in length. At the borders of 

 the papillose area the papillae become broader and flatter, often with 

 a depression in the center, and gradually change over into curved 

 ridges. The remaining portion of the antenna, proximal to the 

 swollen papillose area, bears scattering circular aggregations of 

 papillae, similar to those described in the male (pi. 78, fig. 3). The 

 circular areas range from 50/x to 270/a in diameter and contain 7 to 

 85 papillae. The papillae are arranged in concentric rings about a 

 sensory hair. 



The peduncles of the eyes are partly overhung by the anterodorsal 

 part of the head. In the center of the dorsal side of the head, be- 

 tween the eyes, is a sharply circumscribed area, square with rounded 

 corners (pi. 78, figs. 1, 2; pi. 79, fig. 4), the so-called neck organ. 



The labrum (pi. 79, fig. 4), which is large and conspicuous, extends 

 from the ventral side of the front to beyond the mouth parts pos- 

 teriorly and has a notch on each side that fits around the lower 

 end of the mandibles. The posterior end is truncated but bears a 



