412 CR. Osten Sacken: Cacoxenus indagator Liv. 



dozen speeimens, two of whom are males. Loew does not mention 

 that tlie living specimens have handsome red eyes. These eyes niay 

 fairly be called glabrous; and when Loew said that: „die sparsame 

 Behaarung wird nur bei starker Vergrösserung bemerkt", he must 

 have used a Compound microscope; with a streng lens I do not see 

 any hairs whatever. The chaetotaxy is as follows: 

 Cephalic bristles. 



Vertical bristles four; inner pair converging (when undisturbed, 

 the tips are in contact); outer pair of about the same length, 

 but diverging. 



Postvertical bristles converging, very small. 

 Ocellar pair diverging and proclinate, shorter than the vertical 

 bristles; some very minute bristles between the posterior ocelli. 

 Fronto-orbital bristles — three pairs; the upper pair on a line 

 with the posterior ocelli; the second pair but very little above 

 the middle of the distance between the lower ocellus and the 

 base of the antennae; the third pair is immediately below the 

 second, and therefore very near the raiddle of said distance. 

 The two first pairs are reclinate; the third proclinate. 

 On the sides of the lower part of the face, in the angle between the 

 oral margin and the lower end of the frontal fissure, some small, 

 stiif hairs are inserted, one of which is longer, and has the appearance 

 of a small vibrissa. 

 Thoracic dorsal bristles. 



I. Dorso-humeral bristles: one humeral, two posthumeral (in the 

 praesutural depression), one short praesutural. 



IL Dorso-(or supra-)alar bristles: only two, that is, the second 

 (at the top of the alar frenum), and the third (near the edge of 

 the anterior portion of the alar cavity); the first supra-alar bristle 

 (whose place is on the post-alar callus), is hardly distinguishablc 

 here, but a rudiment of it can be perceived under a strong lens. 



III. Dorso-central bristles : there are no longitudinal rows of 

 them, but only a transverse row of four praescutellar bristles; the 

 outer pair are much longer, and have, in front of them, on each 

 side another, smaller bristle. 



Thoracic pleural bristles. 



Two sternopleural bristles, immediately under the sternopleural 

 suture, one anteriorly, the other posteriorly, of the point of inter- 

 section of the mesopleural suture. 



