378 MR. J. N. HALBERT : NOTES ON ACAEI, 
This species should certainly be referred to the genus Phaulocylliba, Berlese. 
Apart from other differences it may be easily known from Cylliha by the 
absence of the marginal plates, a feature not referred to in the original 
description. The epigastric region of the venter is rather indistinctly defined 
and includes the anal foramen, so that the original figure (35, pi. 1. fig. 4) 
is inaccurate in this respect. The Irish specimens measure 970 /a in length. 
Locality. A few specimens found at roots of decayed Henbane plants at 
Clontarf, Co. Dublin, in August. 
Trachyuhopoda (Dinycuea) cordieei^ Berl. 
1916. Berlese, 11, p. 145. 
A species referred by Dr. Berlese to the subgenus Dinycura, of which it 
is apparently the type. A characteristic feature is the double row of small 
piligerous plates lying between the extremities of the marginal shields at the 
end of the body, much as in the genus Discopoma except that there is but one 
row in this genus. These small plates vary greatly in number (16 to 22) in 
T. cordieri due to a few of them fusing with one another, or with the 
extremity of the marginal shields. The ventral line is thickly chitinized 
and divides the epigastric region into two parts, which lie at different planes. 
The female resembles the male in general structure ; the epigyne is large 
and of the usual arch-like form, its ventral surf ace is strongly punctured and 
is produced anteriorly in a long chitinous process which ends in two or three 
points. Length of female 563 yn, breadth 357 /i. Identification verified by 
Dr. Berlese. 
The nymplia heteromorpha measures nearly 550 /a by 385 jjl ; on the ventral 
side the area surrounding the acetabula is distinctly reticulate. The ventro- 
anal plate is of moderate size (length 70 /^t, breadth 165 yu.) ; it is supported 
by a thick transverse bar which also forms the metapodial line. 
Locality. The male, female, and nymph were not uncommon under damp 
wood lying on the Malahide sandhills, Co. Dublin, in September. 
Trachyuropoda troguloides, Can. et Fanzago, var. oeltica, Halht. 
(PI. 21. fig. 18.) 
1907. 'rrachyuronoda celtica, Halbert, 22, p. 67. 
Described as a new species in the above reference, but more accurately 
placed as a variety of the present species, a decision in which Dr. Berlese 
agrees {in lit.). This variety differs from the typical forni as described and 
figured by Italian acarologists(l, 5, 21) in its smaller size (length of female 
820 At, breadth 486 /i; length of male 742 /i, breadth 436//.). The form 
is more parallel-sided, and the raised central part of the dorsum is of more 
uniform breadth throughout, while in the typical form its terminal part is 
much wider than the rest. The sculpturing of the ventral surface is also 
somewhat different (figured in 22). 
