IlAi,l3KitT — The Acarina of the Seashore. l43 



polygonal rcLiculaLiou is very I'aiiit ; il is clearly inaikeil only on llie Iront 

 of the anal shiekl. 



Habitat. — Occurred under sLones on Lhe salt marsh on Malaiiide Island, 

 MOth May, 1915. 1 have also t'ouiul it on a marshy sward Just above the 

 I'elvetia zone at Ardfry, C'onnty Galway. 



Stigmaeus rhodomelas var. fissuricola nnv. (PI. XXIII, fij,^ 27a, c.) 



A species belonging to Stigmaens (s. str.) as recently defined by 

 Berlese (10). 



Length variable, ranging from ;J30 to ."JSO^i in mature specimens ; breadth 

 loOju; colour a shining orange; form elongate (fig. 27a). Cephalothora.x 

 with rounded sides, well marked off from abdomen in most specimens ; 

 central shield oblong, almost reaching the front and hinder margins, carrying 

 three pairs of hairs (fig. 27 b), the second pair very long. Abdomen with 

 pronounced " shoulders," and marked lateral indentations, one beyond the 

 middle, the other close to the end of the body. Central shield long, oval, 

 with two pairs of hairs ; behind this is a small plate, equally broad, but less 

 than one-third as long as the preceding shield. On each side of the second 

 plate are two pairs of small hair-bearing plates. End of body truncated and 

 bordered by a narrow plate, carrying two long hairs. There are also two 

 pairs of marginal hairs on the anterior part of the abdomen. The genito- 

 anal shield is truncated in front, not quite reaching the last pair of epimera, 

 with three stout marginal hairs on its anterior part. 



The mouth parts (fig. 27 c) are large, and the mandibles (length about 

 70^) robust. The five segmented palpi are long ami stout ; third segment as 

 long as the three terminal ones together, with three long hairs ; the terminal 

 appendage reaches well beyond the claw. Legs comparatively long and 

 robust; hair armature as in figure. The fourth segment of the last two pairs 

 without hairs. 



Appears to differ from the typical form in the more elongate shape, in 

 the absence of lateral plates at each side of the large central alidominal 

 shield, and by the fact that this shield is followed by a smaller transverse 

 plate. The hair armature is longer. I cannot find any trace of pigmented 

 eyes in my specimens. 



Habitat. — An active, orange-coloured species, which is cdiunKui in ihe 

 Orange Lichen and I'elvetia zones at Malahide. It lives chiefly in liorizontal 

 fissures in the limestone rocks, in from almost dry to damp iilaees. 'I'he dutes 

 of capture range from February to October. 



