Some Ectoparasites in the South African Museum. 303 



Though they can serve only a transient purpose, the following 

 notes on the $ $ of these four forms are offered. The $ ? can 

 best be separated by their size (see p. 302 ). 



Description of E. SIMPLEX, spec. nov. 



$ . Head. Clypeus slightly rounded in front but with distinct 

 lateral angles. Signature reaching the edge of clypeus, its surface 

 anteriorly with parallel furrows. Anteriorly the 

 sides of the shield-shaped signature are concave. 

 The apex of signature posteriorly considerably 

 produced. Below at edge exactly of signature one 

 hair on each side. Two hairs at anterior angle 

 of clypeus, one at end of band, and the other 

 midway thence to edge of signature, one hair 

 below near end of clypeal band. One hair at 

 edge midway to suture. No sutural hair. Suture 

 slanted forward to lateral angle of signature, its 

 posterior margin very clearly defined by inner 

 branch of antennal band. This branch sharply 

 bent back at level of lateral angle of the signa- 

 ture. One post- antennal hair from below and the 

 usual dorsal hair at angle of trabecula with head. 

 One short spine between basal trabecular hair 

 and the point of the signature. 



Trabecula long, not reaching quite to the end 

 of the 1st antennal joint. Above the insertion 

 of the 1st joint 1 moderate bristle. First 

 antennal joint moderately long. Short dorsal spine near base and 

 2 strong dorsal hairs placed distally in the middle line. One 

 very strong antero-ventral distal hair, which sometimes appears to 

 come from the apex of the trabecula. Second joint extremely long, 

 1 short dorsal hair near base. Joint medianly constricted some- 

 what and then distally expanded. Third joint short 1 dorsal 

 hair. Fourth joint very short, not inset into the 3rd, but rising 

 freely from its distal surface. Fifth joint long with 6-7 terminal 

 bristles. Ocular band distinct. Eye moderate, prominent rounded, 

 with spine. 



Below the eye 1 spine, posterior angle of temple with 2 short 

 spines. Between these and the eye 15 hairs in 2 rows 7 strong 

 at the edge and 7-8 weaker on the dorsal surface of the head at a 

 short distance from edge and parallel with it. 



Occiput markedly re-entrant and medianly swollen. Occipital 



24 



FIG. 2. E. SIMPLEX. 



