137 



Caudal rami short, quadrangular, apical setse of moderate length. Anterior an- 

 tennae scarcely more than half the length of the cephalic segment, and only slightly 

 attenuated, distal part about half as long as the proximal one. Posterior an- 

 tennae with the outer ramus considerably shorter than the terminal joint of the 

 inner, and provided with 5 seta?, 3 lateral and 2 apical. 1st pair of legs com- 

 paratively strongly built, outer ramus fully as long as the inner, and having the 

 middle joint rather elongated, spine of this and the preceding joint coarsely pec- 

 tinate on the one edge, last joint short, lamelliform, and armed with 2 small, and 

 2 very strong claws, inside which a slender ciliated seta is attached; inner ramus 

 \vith the seta of the 1st joint attached about in the middle, the 2 outer joints 

 short and thick, apical claws rather unequal, the inner one very strong, the outer 

 shorter and much narrower. Last pair of legs with the distal joint rather nar- 

 row and densely hairy outside, inner edge straight, outer convex and carrying in 

 its distal part one large, and 2 very short setse, tip provided with 3 setse, the 2 

 outer of which are very thin and unciliated; inner expansion of proximal joint 

 broadly rounded at the end, and carrying 5 unequal setse. Ovisac large, rounded 

 and distinctly applanated. 



Male somewhat smaller than female, and having the urosome compara- 

 tively less broad and distinctly 5-articulate. Anterior antennse more strongly 

 built and distinctly prehensile, the hinge occurring between the first 2 joints of 

 the terminal part. Spine inside the 2nd basal joint of the 1st pair of legs trans- 

 formed into a strong hook. Inner ramus of 2nd pair of legs with the 2 outer 

 joints confluent, and at their junction, outside, provided with 2 closely juxtaposed 

 slender spiniform appendages, tip produced in 2 short and somewhat unequal 

 spines. Last pair of legs with the distal joint comparatively shorter than in female, 

 nd having the 3 setse of the outer edge of equal size; inner expansion of 

 proximal joints very slight, with only 3 marginal seta?. 



Body in both sexes of a light yellowish colour, with 2 or 3 dark viola- 

 ceous transverse bands across the anterior division, and several less distinctly 

 defined bands of a similar hue across the urosome. 

 Length of adult female 0.74' mm. 



Remarks. This form was recorded by Boeck as early as in the year 

 1865, and was subsequently also found off the British Isles by Prof. Brady, who, 

 as stated above, referred it to the genus Thalestris. In its external appearance 

 it somewhat resembles Zaun xiiii/atnx. though, on a closer inspection, easily dis- 

 tinguished by the want of a true rostrum and by the peculiar colour of the body 

 when alive. 



