VARROA. 217 



dibles of the 9 (^^^6 cT is unknown) are anomalous, viz. 

 Berlesia G. Canestrini, in which the upper jaw is rudi- 

 mental and the movable lower jaw on the contrary normal; 

 but this genus seems to me, according the ventral shields, 

 not closely related to the genus in question. 



Varroa Jacohsonii, no v. spec. 



Female. Length 1065; width 1575 /a. — Colour dark 

 brown. — Shape a transverse oval, flat, scarcely convex 

 dorsally, a shape extremely rare in Acarids, and I may say 

 immediately indicating the parasit, and especially a parasit 

 which must press itself in a narrow room, as there is an arm-pit 

 of a lizard, e. g. Geckobia Mégnin {Thrombidiidae Geckobiinae) 

 or Aponomma Neumann {I.vodidae Ixodinae Lvodae)^ or be- 

 tween head and thorax, or between thorax and abdomen of 

 Insects, e.g. Antennophorus Haller {Parasitidae Aiitennopho- 

 rinae). — Texture. Dorsally we observe narrow scales (fig. 3) 

 which generally are ranged transversally like in our fig. 3, at 

 the most following the posterior edge of the abdomen, 

 consequently forming crooked rows with their concavity 

 forward, therefore almost like the direction of the hairs 

 (see fig. 1). — On the ventral side the shields are formed 

 by the same narrow scales, but the direction of the rows 

 is inverse, viz. with their concavity backward, following 

 almost the crescent-shaped sternal shield. — unprotected 

 parts finely wrinkled. On the sufflexed margin of the dorsal 

 shield the scales follow the edge. 



Dorsal side (fig. 1) wholly protected by one shield. It 

 is nearly oval, with the posterior edge more rounded than 

 the anterior one, and here the median part of the edge 

 slightly projects forward (too much in my drawing). The 

 shield is densely hairy, and there are two kinds of hairs. 

 Laterally one observes a row of about 19 slightly curved 

 and sharply pointed bristles, as delineated under higher 

 powers in fig. 5. Moreover the dorsal side is covered with 

 rather concentrical rows of hairs, distally somewhat hairy 

 themselves, as represented in fig. 4 under more amplifications. 



Notes from the Leyden IMuseum, Vol. XXIV. 



