

THE FOEQL,: I L- : 77 7- 



Aearina show great resemblance to those of the Araneae (figs. 



1 '..elieerae and pedipalps unite to form the proboscis 



* The abdomen (in Aim now decidedly preponderates 



-.-•: -~l- :.:.: :.:: ::.:: : : _ - y :L:~ 



pairs of limbs when :ne embryo breaks through its envelopes and 



. - : ..: . F;_-= :•!— : -j ; . VT T :i_i= -l;L. :;. -.1^ A:;.:i:-i. 



a larval stage with on/y three pat listinguished from 



four pairs of the nymph and of the adult, which, in other 



points of both outer and inner organisation, the embryo greatly 



2. The F:rn:a:::i ::' :ie Larra.1 Ii:eri-e-:s and :ze 

 Furrier Cnirse c: DeTelopnen: 



I: was mentioned that, in many Acarina, e.#., Aiaz, the embryo 



- off a cuticular integument at an early stage when the limbs 



have not yet developed or are only indicated. Clapabede's dm&- 



ovum is thus produced, the embryo within the egg-shell thus 



U:ci.:irei:".:i-'. ::. . --.- :. : ■::.--'.[: J._ ". T:.r :--~en"-.lin:e 



: the "deutovum " with the embryo enclosed in it to an intact egg 



is increased by the fact that, after casting off the primary egg-shell 



. the embryo undergoes further changes in its external form within 



:ovnm. In Trombidium and Myobia this entieular membrane 



is east : be rudiments of the limbs have appeared (F .. 52 



In T Hunt, this membrane is provided with appendages which 



-_::: 7:_i :':.r .::__' - '...■'.- -.. .: - Ht-inkjv:- . .: :..- > :. . : '.-- .'.-- 



Here the limbs form in the usual way (Fig. 50 2?), but 



have rrown to a considerable length they become applied 



to the ventral surface of the body, and gradually become flattened to 



h a degree as hardly to project from the surface of the body. 



..ale embryo is once more oval and apparently devoid of 



appendages F:_ ' '. . -: ^e a cuticular membrane becomes 



detached from the embryo, bearing near its antero-dorsal extremity 



(in the nuchal region, according to Clapabede) a tooth-like structure, 



composed of two thin chitinous processes closely applied to one 



another. This structure is not well depicted in Fig. 50 C and Z>, 



■ [Tl ts is true of the forms described by Hffmnxc, hat by no means itoMs 

 good for all . tine majority of which the cheJaeerae remain as 



perfectly distinct and movable organs. — En.] 



- ;::.':'..; J ' ■ ■■:-...' :'..i :/.:.': I.:--- • " -- "- . . 1 



nymphs do net's' - is in other respects, fer instance, in 



-- 



."..-■-; . ..: — '■ — - 



