512 Mr. S. Hirst on the Mite associated with 



liaiis, witli tlieii- end blunt, as i£ broken ofE, placed dorsally 

 near the end of the first tarsus. Fourth leg with five hairs ; 

 tliree of them, of varying length, arise some distance from the 

 distal end, the other two are placed at the extreme end of 

 the tarsus, one of them being very long and tine, the other 

 fairly long. 



Tracheal tubes distributed as shown in fig. 5. 

 cj . — Z)o9's«Hi consisting of only three distinct divisions or 

 tergites, the first (cephalothoracic) being large, the second 

 (first abdominal) stilllarger, the posterior one quite small and 

 oval in shape. There is also the curious little caudal struc- 

 ture present as well in the males of Tarsonemus. 



Cliatotaxy of Dorsum. — There are in all twelve hairs on 

 the dorsal surface — viz., two pairs on the first tergite, one 

 placed behind the other, an atiterior row of four and a poste- 

 rior pair on the second tergite, and a pair of shorter hairs on 

 the small posterior tergite. 



Palp. — Slender, ap(>arently unsegraented, and of small 

 size, but fairly elongated ; two minute hairs are present on it. 



Chelicerw. — Long and styliform, as in the female and 

 larva. 



Legs. — With the exception of the last one, the legs are 

 very like tliose of the female. Fourtii leg somewhat shorter 

 than the others, and without claws or pulvillus; it is divided 

 into three free segments, the basal one being the stoutest and 

 bearing a single hair ; the second segment with two ventral 

 and one rather long fine dorsal hair ; tarsus ending in a 

 short blunt spine and a very long fine hair. 



Nymphal Stage. — There is no free nymphal stage, but: if 

 the larval skin containing a fully developed adult of either 

 sex is carefully examined, an innerdelicate chitinousmembrarie 

 (without any trace of limbs) enveloping the mite can be 

 found, and perhaps it represents the nymphal stage. 



Larval Sta'gp differing considerably in size and general 

 appearance' according to the degree of deyelopment. It is 

 elongated and iisually egg-shaped or sac-shaped. 



Dorsum with bands of transverse striations alternatino- 

 with plain unstriated areas ; the latter are possibly weak 

 tergites, and be4r very short hairs — one pair on the first 

 area, two pairs on the second, one pair on the third two 

 pairs on the fourth; the first (cephalothoracic) tergite appears 

 divided in two when examined from above, so there is evidence 

 of five segments in the larval stage. Posteriorly (ventrally) 

 there is a minute oval (anal) plate at the extreme end of the 

 body. Laterally there are a number of straight and curved 



