ACARI 599 



second one (counted from the top), which in the female is 

 bipectinate, or rather palmate, is in the maie quite single and 

 stout, horn-shaped, and points straight forward, projocting 

 a little beyond the top of the maxillary plates ; the third 

 one, which in the female is bipectinate, and almost twice as 

 long as the second one, is in the maie also the longest of ail, 

 but very slender and setiform. 



The maxillary plates are slightly longer, with more poin- 

 ted cusps than in the female. Maxillary palpi (fig. 125) 

 with jointi almost twice as wide as joint II, flattened from 

 both sides, and twice as long ventrally as dorsally ; at the ante- 

 rior angle, ventrally, it bears two large, bipectinate bristles, 

 pointing almost perpendicularly downwards ; of thèse, the pos- 

 terior one is one and a half times as long as the anterior eno ; 

 the folio wing joints decrëasing successively in width : joint II 

 nearly twice as long as joint III and IV, which are of equal 

 length ; terminal joint only haK as wide as joint IV, and one 

 and a haH times as long as it is wide at the base, with straight 

 ventral side and obliquely truncated at the top. For the number 

 and size of hairs I refer to the dra\ving. One remarkable feature 

 is that the anterior edges of joint s II and III are dentate. 

 ** Ventral side. 



Tritosternum (figs. 127 a et b) of the same shape as in 

 the deutonympha, only the ventro-lateral cusps are longer. 



In the maie the génital aperture is situated far forward, 

 a little in front of the middle of coxae III. It is almost circular, 

 and surrounded by a strongly cliitinous ring. The genitalplate 

 is pear-shaped in outline, top backwards, and attached to the 

 posterior margin (fig. 119). The 5 pairs of hairs are not placed 

 laterally, as is generaUy the case, but one pair is placed. near 

 the anterior edge, one pair a little in front of the génital aper- 

 ture, one on a level with its posterior margin, both half-way 

 between the aperture and the sides 'of the shield ; the two 

 posterior pairs are placed in a transverse, anteriorly concave, 

 Une behind the aperture. 



AROH. DE ZUOL. EX1>. ET UÉN'. — ,')" SÉRIE. — ■ T. VU! — (Vn). 42 



