

DESCRIPTIONS OF GKNERA AND SPECIES. 243 



it points outward and backward. The ninth is equally 

 long and placed on the periphery about where the 

 hind margin may be considered to commence; then 

 follow the tenth and eleventh pairs, much shorter. A 

 twelfth pair crosses the margin here ; it springs from 

 the abdomen slightly anterior to the insetting of the 

 8th hair, but much nearer to the middle line of the 

 body ; this hair is the longest hair on the body. The 

 13th is nearly, but not quite, as long ; it points back- 

 ward, and is set within the hind margin. The 14th, a 

 trifle shorter than the 13th, is set a little under the 

 body. The 15th and 16th hairs are comparatively 

 short, the former not a third of the length of the 14th ; 

 the 16th is near the bursa copulatrix. All these hairs 

 project beyond the margin of the body ; but there are 

 two pairs on the dorsal surface which do not, the 

 anterior of these is the longer. All these eighteen 

 pairs of hairs are finely pectinated (or serrated) ; more 

 finely than those of G. spinipes, and the hairs them- 

 selves are not so stout as in that species. The bursa 

 copulatrix probably projects more than in any other 

 known species of Glycyphagus. The legs are long and 

 thin, the fourth pair passing the hind margin by 

 almost the whole length of the tarsi ; this length of 

 the leg is almost entirely diie to the length of the 

 tarsus, which in the two posterior pairs of legs is as long 

 as all the other joints put together. There are one to 

 three curved pectinated hairs on each joint, except the 

 coxa and tarsus, of each leg ; excepting in the case of 

 the femora of the two posterior pairs, and there are a 

 few fine hairs besides the tactile hairs. The tarsi are 

 entirely without the very fine short hairs which so thickly 

 clothe those o/'Gr. spinipes, but instead there are a few (four 

 to seven) setiformhairs on each tarsus, which, although small 

 and fine, are considerably longer than those of G. spinipes ; 

 this forms the easiest and most certain mode of 

 distinguishing the species. The epimera of the first 

 pair of legs are joined to the sternum ; those of the 

 second pair are free. The coxae of the two posterior 



