LAELAPS VERSTEEGII. 223 



NOTB IX. 



LAELAPS VERSTEEGII, 

 A NEW SPECIES OF PARASITIC MITE 



DKSCRIBED BY 



Dr. A. C. OUDEMANS. 



(With 15 figures). 



Male. Length 1650, width 1140 jtt. — Colour pale; dorsal 

 shield straw-coloured. — Shape like that of Laelaps ayilis 

 C. L. Koch, broad-oval, top forward, with a slightly indi- 

 cated shoulder above legs 1 aud II. — Texture scaly in the 

 shields; finely wrinkled in the weak skin. 



Dorsal side (fig. 1) protected by one shield, long 1530, 

 wide 910 |C*, so that a wide margin of weak skin surrounds 

 the shield from the shoulder backwards, and posteriorly. 

 Anteriorly the shield shows the same shoulders above legs I 

 as the body, and less developed shoulders above legs IL 

 The side-edges of the shield are slightly rounded, the 

 posterior edge well rounded. Hairs. The hairs are bristles 

 of two kinds ; there are longer and finer ones on the shield, 

 and very short (comparatively thicker) ones in the weak 

 skin. In general the length of the bristles on the shield is 

 equal to the width of femur I or II. Four stronger ones 

 are visible on the anterior fourth part of the shield, aud 

 six longer ones are planted in the posterior edge of the 

 shield. The number of the hairs is normal in the median 

 third part of the shield, abnormal (more numerous) in the 

 lateral third parts of the shield, where they are arranged 

 in oblique rows of about three to six hairs each. In the 

 anterior third part of the shield these oblique rows run 

 from the edge of the shield inward and forward; in the 

 remaining part they run from the edge of the shield 



JNotes from the Leytlen IMuseum, Vol. XX1V„ 



