189S.) 



167 



characters in common with L. viburni. By the most careful comparison 

 of actual specimens of this latter has it been possible to establish the 

 distinctive characters of this interesting species, which may be re- 

 cognised by its shorter 3rd and 5th joints in the antenna? ; the shorter 

 anterior legs, with the constricted tarsi ; much shorter marginal 

 spines ; and the complete sac. 



The scale of the ^ is decidedly smaller than that of L. viburni, 

 but differs in no other respect. It may be well to note that some of 

 the ? sacs appeared much larger than the measurements given above, 

 but being badly fractured, it was considered unwise to take the 

 measurements. 



Dacttlopius hibebnicus, n. sp. 

 ? adult oviparous, elongate-ovate, covered with a sac at gestation. Antennse 

 (fig. 1) of eight joints, of v^hich 8 is the longest and about 

 equal in length to 5, 6 and 7 together ; 1 and 2 together 

 about equal to 8 ; 3, 4, 5, 6 and 7 shortest and subequal ; 

 all with many fine hairs. Mentum biarticulate ; on either 

 side of apex several (? five) rather long hairs, arranged 

 close together; rostral filaments, unexpanded, shorter than 

 anterior legs. Legs (fig. 2) long, posterior pair longest ; 

 tarsi with claw about half the length of the tibiae, with four 

 very slender digitules. Anal lobes large, studded with 

 numerous short, stiff spines and hairs, each terminated with 

 a single long hair. Anal ring of six hairs. Dermis with 

 short scattered hairs ; and at margin in front many scattered 

 circular discs. Long, 4 mm. ; wide, 1'55 mm. 



Sac of the ? white, closely felted and complete, but 

 easily ruptured. Long, 4 — 5 mm. ; wide, 2'55 — 3 mm. 



Hab. : in the " crowns " of a species of grass in sandy soil, on a 

 chalk cliff close to the sea, at Ballingtoy, Co. Antrim, Ireland. 

 Collected by Miss Tomlin, September 3rd, 1893. 



This differs from any other known European species in con- 

 structing a complete felted sac. In this respect it resembles the 

 African D. graminis. Mask., and the New Zealand D. globosus, Mask., 

 but the sac is more felted than either of the above. Altogether it 

 seems quite distinct, and is the second species of Dactylopius now 

 known to occur in the British Isles. 



It would be interesting to have this species in its earlier stages, 

 especially that immediately prior to gestation, as it is not now known 

 whether it possesses the ordinary marginal appendages common to 

 most species. One of the specimens examined was badly parasitized, 

 but did not differ from any of the perfect examples. 



I am greatly indebted to Miss Tomlin for the discovery of this 

 interesting species. 



Chester : May 23rd, 1895. 



