THE GENUS LEBERTIA. 505 



Lebertia Halberti Koen. 



(Sub-gen. Mixolebertia.) 



1902. Lebertia Halberti Koenike, Zool. Anz., xxv. 610. 



This species was taken by Halbert at Dartrey in Ireland 

 in 1899, and so far only the male appears to be known. In 

 outline the body is oval, being about 1*36 mm. in length and 

 about 1*20 mm. at its broadest part. The colour of the body is 

 a dark green described by Koenike as a greenish grey the 

 dorsal surface being adorned on each side of the median line by a 

 row of roundish dark spots. As is not uncommon, the colour of 

 the limbs and palpi is much weaker than that of the body. The 

 skin is without the strong ridges noticeable in other species, but, 

 notwithstanding, it is adorned by fine lines crossing one another 

 as to form an elongated mesh work. 



The palpi are 0'43 mm. in length, the segments being respec- 

 tively 0-04, 0-10, 0-10, 0-16 and 0'03 mm. in length, and in their 

 bristle armature they closely follow the type. The first segment 

 has one short distal, slightly curved spine on the extensor surface. 

 The second segment has two similar but rather larger spines 

 on the middle of the extensor surface, and on the distal inner 

 surface adjacent to the extensor surface two moderately long 

 bristles. The distal flexor surface is armed with the usual long 

 bristle. A noticeable feature is the presence of six bristles, extend- 

 ing nearly to the distal end of the fourth segment, on the inner 

 surface of the third segment. Three of these are distal, one being 

 adjacent to the flexor surface and the other two close up to the 

 extensor surface, one being practically on the extensor surface. Of 

 the other three, one is proximal, while the remaining pair is 

 situated about midway and occupies about the same position 

 as the pair anterior to it, if anything rather more towards the 

 extensor surface. The fourth segment has four fine hairs grouped 

 at the distal extensor extremity. The posterior of the two pores 

 on the flexor surface is accompanied by the typical moderately 

 long hair. 



The lateral processes at the anterior end of the capitulum 

 have very little tendency to spread out laterally they extend 

 inwards until their extremities are about in line with the base 

 of the posterior pair. The claws of the mandibles have a row 

 of fine teeth on their concave side. 



Joirax. Q. M. C, Series II. No. 76. 35 



