1915]. 65 



with a dense brush of slender hairs on the proximal loVje, some stout 

 short bristles being interTuixed with the hairs. 



? . Seventh sternite (fip;. 18) produced into a broad truncate lobe, 

 the lower angle of which is strongly rounded, the upper one much less so. 

 Eighth tergite with seven or eight bristles below stigma. Stylet less 

 than three times as long as it is broad at the base. Eeceptaculum 

 seminis quite different from that of hirundinis, rusticus, and farreni, 

 the head being shoi-ter but much broader than the tail, with the ixpper 

 and lower edges (in side-view) parallel in centre. 



A very rare species apparently confined to Great Britain. A few 

 examples were found by the Rev. James Waterston in the nests of the 

 house martin (Chelidon urhica), in Kincardineshire. 



11. Ceratophyllus hirundinis Curtis (1826). 

 (Figs. 19, 20). 



Two rows of bristles before the eye; occiput with two bristles 

 above the middle of the antennal groove. Spines of pronotal comb 

 slightly shorter than pronotum. The portion of the metanotum 

 posterior to the row of long bristles quite short, almost membranaceous, 

 without the short and strongly chitinised apical spines present on the 

 metanotum of most other species of Ceratophylhis, but instead of 

 these spines on each side with one or two long bristle-like spines 

 resembling the mesonotal spines ; apical portion of some of the ab- 

 dominal tergites likewise reduced, but the spines distinct. Sensory 

 plate of ninth tergite smaller than in the other Geratophylli, being 

 somewhat shorter than the third hindtarsal segment. Hindfemur 

 with a lateral row of 6 to 9 bristles on inside. 



^ . Rough area on inside of eighth tergite large, well defined ; 

 on outside of eighth tergite aboiit 18 long bristles at and near the edge. 

 Eight sternite (fig. 19) long, nearly straight, widened at the apex and 

 here excised, bearing 6 or 7 long bristles on each side ; proximal 

 portion of eighth sternite produced upwards into a slender process. 

 Process of clasper shaped like a club. Finger widest in the centre, 

 the hindmargin being obtusely angulate at this point and bearing here 

 two long and very strong bristles, another long but thinner bristle 

 being placed at the apex of the finger. 



$ . Seventh sternite irregula.rly rounded (fig. 20) ; poststigmatical 

 portion of eighth tergite likewise rounded, with more than 12 bristles 



