FROM THE society's GARDENS. GTS 



is brown, flat. The posterior half possesses well-marked lateral 

 ina.rgins, with a transvei'se band across the base. Parameres: 

 Elongate curved rods, in cross-section circular. At its base each 

 paramere possesses a large circular condyle which is turned 

 inwards like the head of the femur in man. In front it is arti- 

 culated with the posterior lateral angles of the basal plate, and 

 behind, it lends a surface for attachment to the mesosome. 

 Mesosome : The upper endomere consists of two square " wings " ; 

 each "wing" has a straight outer lateral margin and a charac- 

 teristic " nick" in the posterior margin, after which the mai-gin 

 curves inwards and backwards towards the forked base of the 

 elongate penis. The lower endomere is a small plate lying 

 between the condyles of the parameres. Under the penis is a 

 median elongate piece, bifid at tlie tip, representing telomeral 

 chitinisations. 



I>OLLABEM-A, geil, nov. 



The diagnostic characters are few, but sufficient. They are the 

 shape of the head taken in conjunction with the tergites of the 

 abdomen, which in both sexes stretch right across and are on 

 each side fused with the pleurites. Philopterids living with 

 F. humeralis on JVumenms. 



Genotype : Dollabella lestuclinariiis Denny. 



DOLLABELLA TESTUDINARIUS D. (8, p. 96). (Text-fig, 23.) 



Several specimens from ISfumenins phceopus (Linn.). 



Male Eeproclvciive System. — In proportion to the f^esicula the 

 testes are veiy large, I'oughly pyriform, nearly as broad as long. 

 The veslcula seviinalis is elongate, pear-shaped, with a median 

 longitudinal groove. The leather elongate accessor}^ glands, one 

 on each side, lie alongside of it in the posterior portion, and enter 

 the top of the ductus. The ductus ejaculatorias is long and 

 narrow, with several loops, 



Male Copulatory Apparatus. — Basal plate : In front for a little 

 more than a third of its length it is evenly chitinised and of a 

 uniform brown colour. Behind, strong lateral margins with a 

 clear membi^anous area between. At each lower lateral angle 

 the articular surface is oblique, passing downwaixls from within 

 outwards. A small angular process projects a little beneath the 

 base of each paramere. Parameres : Slender, elegantly moulded 

 rods, which a little after halfway turn inwards in a pronounced 

 bend, and then run straight forwards to the distal end. The base 

 of each paramere is characteristic in shape, being roughly qua,dri- 

 lateral, with two sharply defined posterior angles. Halfway 

 down, in the middle of its dorsal surface a minute hair on each 

 paramere ; subapically on the outside another minute hair. 

 Mesosome : This includes the endomeres, an upper and a lower, of 

 complex form, the upper one possessing subapically on each of it;S 



