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STANLEY HIRST — ON A NEW SPECIES OF MITE (TARSONEMUS) 



of hairs occur on the upper surface of the " cephalothorax " ; the first two pairs 

 are not very long and they are placed closer together than the hairs of the 

 posterior pairs ; the hairs of the third pair are very long and fine and those of 

 the fourth are fairly long. " Abdominal " part of body furnished dorsally with 

 three pairs of hairs ; the hairs of the first pair being long, but the others con- 

 siderably shorter. A minute hair is also present on each side of the conical 

 sexual organ at the posterior end of the body. 



Fig. 1. larsonemus sphiipcs, Hirst, $ ; 

 a, dorsal view : b, ventral view. 



Capitulum about as broad as long ; on each side it has a long curved hair, the 

 terminal part of which is exceedingly fine. Palpi minute and placed on the 

 ventral surface of the capitulum. Each palp has a small hair near the proximal 

 end and another very minute hair at the distal end also. 



Legs : basal segments of anterior legs much enlarged, as in T. spirifex. 

 Anterior legs furnished with hairs and a few minute spines. In addition to 

 hairs, the third leg has several well developed spines on its anterior surface — a 

 slender antero-ventral spine being present on the femur, two strong spines on the 

 patella, and a single strong spine on the tibia. Fourth leg much reduced in 

 length and strongly modified. On the inner side, it has a large, but very thin 

 lobe, and a short, but distinct, ventral spine is situated at the point at which this 

 membranous lobe joins the limb. A strong and fairly long spiniform bristle is 

 present near the claw-like distal end of this leg.* 



Length of male '2 mm. 



° The last leg of the male of T. hominis, Dahl, is armed with two bristles, which are ap- 

 parently placed in the same positions as the spine and bristle of this leg in T. spinlpes. Prof. 

 Dahl does not figure any lobe on the inner side of this leg, but his drawing is based on photo- 

 graphs, and this delicate membranous structure probably would not be shown distinctly in a 

 photograph, 



