April 1SS9.] 



PSYCHE. 



199 



nucleus at the top or end. Thev are 

 grouped on each side of the middle near 

 the front edge, there being 35 on each 

 side. An irregular row of these cups 

 extends along each side, some occur 

 vmder the base of the labrvim, but they 

 are most numerous on a field corres- 

 ponding to the front edge of the clypeus, 

 there being 50 on each side, or 100 in 

 all, where in CeiitJtofhih-is tliere are 

 only 9 or lu. 



The gustatory cups being so much 

 longer, better developed and much more 

 numerous in the cave Hadenoectts than 

 in Ceuthophihis., which lives under 

 stones, etc., out-of-doors, it would seem 

 as if the sense of taste were much more 

 acute in the cave-dweller than the out- 

 of-doors form, though it does live for 

 the most part in twilight. 



CotiocepJiabis ciisiger Harris, 9 . — 

 The epipharynx is full in front, with a 

 deep, narrow, median furrow or gutter 

 along which the liquids probably pass 

 into the throat. At the end is a fringe 

 of fine bristles. On the clypeal region 

 there are about 25 taste- cups, a few pro- 

 jecting over the edge of the gutter ; a 

 few more are scattered along the gutter 

 to near the end of the labrum. 



Gryllus sp. — Tn the common black 

 cricket the labrum is rounded in front 

 with a median excavation, the sinus 

 being fringed with rather long, stout, 

 flat, truncated setae, which are longer 

 on the sides than in the middle. There 

 are traces of a longitudinal suture. 



The surfaee of the epipharynx is 



covered towards the front with fine 

 hairs ; on the sides in front are large 

 coarse spines, and at the base is a large 

 area covered with coarse, defensive 

 spines, directed inwards towards the 

 median furrow, which is free from setae. 



Taste-cups are abundant ; in front, at 

 some distance from the front edge is on 

 each side a group of conical rounded 

 cup-like papillae, carrying the nucleus 

 at the top, there being about 30 arranged 

 in four verv regular rows. Nearer the 

 middle is a group, on each side of the 

 middle of the furrow, of 8 taste-cups 

 which are situated just in front of the 

 ends of two curved tracheae. On the 

 outside of the tracheae is a linear group 

 of about 60 taste-cups extending from 

 the base to near the isolated group of 8 

 cups. Another sensory field containing 

 45 taste-cups on each side of the median 

 line, or 90 in all, scattered over the 

 area, is situated under the nose of the 

 labrum and front edge of the clypeus, 

 most of them behind the labrum. 

 'J'here is also a lateral group of about 

 14 taste-cups on the outer edge on the 

 front region of the clypeus and situated 

 outside of the base of the curved tra- 

 cheae. The sides of the epipharynx 

 under the clypeus are clothed with fine 

 " gathering" or "• hooked hairs." 



Oecaiithtis niveus Serville 9 . — The 

 shape of the labrum and epipharynx, as 

 well as the number and distribution of 

 the taste-cups, are almost exactly as 

 described in Conocephalus ensiger. 

 {To be continued.') 



