616 IVAR TRAGARDH 
Loc.: Juan Fernandez, Masatierra, under stones 10 m, from the sea- 
shore. 24.12. 1916, no. 184. 
Numerous species of Cosmolelaps having been captured in ants’ nests, it 
is possible that also the present species is associated with ants. The records 
available do not, however, give us any information on this point. Only one 
species of ants, Prenolepis obscura MAYR subsp. vaga FOREL has so far been 
collected on Masatierra, without any data regarding the locality. 
24. Lelaps pallidus n. sp. — Fig. 145—147. 
As pointed out by OUDEMANS (1928, p. 163) our knowledge of this genus 
is still very imperfect, many species being very insufficiently described. OUDE- 
MANS has, however, himself cleared many obscure points and given excellent 
descriptions of some species and Vv. VITZTHUM has recently (1926) described 
several new species and established two new genera. 
One of the probably most common species is L. echzdninus BERL. whose 
host is Rattus norvegicus and Rattus rattus. This species would, as a conse- 
quence, be the one we should expect to find on Aesfus rattus even on Juan 
Fernandez. It is, however, not possible to identify the present species with 
this species nor with any other, although it is most closely related to echzdnznus. 
Lelaps echidninus 8 was described very briefly by BERLESE in 1887. 
OUDEMANS (1928, p. 196) critizises BERLESE’s description and drawings but 
his comments seem to be due to a mistake as to what BERLESE intended 
to say. When B. writes »coxa unispinosa» I suppose that he called spines 
only the very’ stout and short pointed: bristles, but did not include the more 
ordinary hairs, which are to be found on the anterior side of coxe II and III 
(comp. fig. 146). OUDEMANS further doubts the accuracy of B’s drawing of 
coxa I, showing two bristles, the posterior one of which is longer and more 
slender than the anterior one. To judge from the present species, which has 
exactly the same feature, it is present also in ZL. echtdninus. OUDEMANS seems 
to have overlooked that v. VITZTHUM’s drawing (1926, fig. 38, p. 58) agrees 
with BERLESE’s in this respect. 
Female. 
Length 1040 u, width 770 , thus considerably larger than the type 
specimen of L. echidninus which according to BERLESE is only 800 p, long. 
Both Hirst and v. VirzTHUM have, however, recorded larger specimens. 
Colour pale brown. 
Dorsal shield (fig. 145) anteriorly not so pointed as it is in L. echid- 
minus according to Vv. VITZTHUM (1926, fig. 37, p. 57). It has a short, blunt 
median mucro and has two pairs of shoulders, above legs I and II, in front 
of which the edge is slightly concave. The sides are convex, as is the posterior 
edge which, however, is a little obtuse in the middle. 
The surface of the dorsal shield is very finely scaly, the polygonal areas 
being rather short and broad and more distinct in the posterior half than in 
