->i- 



( 542 ) 

 Genus CERATOPSYLLA. 



This genus coutaius the fleas parasitic ou bats. It i.- au ext remel y well-detiued 

 genus, as ixjinteJ out by Dr. Waguer. At the extreme anterior portion of the head 

 there are two cliitiuizeil tlnjis on eacli side. The maxillae are of the ]iefuliar shape 

 shown in the figure (PI. XVI. f. <i). 



In the present article 1 treat of eight-combed species only : and as a 

 considerable amount has already been puljlished on these species by Dr. Wairner, 

 Hoi: Sor. I'.nl. h'ai<)<. XXXI. pi>. ','0 — ;W, I have ondeavonrcil to cull attention t(j 

 the most salient features only. 



;"). Ceratopsylla elongatus (PI. XV !. tig. 6 ^', .>s ?, In d). 



C. domjatus Curtis, Guide Gen. p. 36 (1829) ; id., BrilishJCnI. IX. No. 417. f. (1832). 

 C. subobsnim Wagner, Jfor. fioc. Fliil. Hnss. XXXI. p. 32't. TX. f. 15 (183^). 



£«.«.' The present species, which has already been described by l)r. Wagner, Lr., 



is the largest member of the genus Ceratopsi/l/a hitherto recorded from the 

 British Islands. The pronotum anil the metanotnm bear combs at their jiosterior 

 edges. The first six tergites of the abdomen likewise bear combs at their posterior 

 edges. 



On p. .54:i I give a table showing the variation in the number of teeth in these 

 combs, in both sexes. The episternum ( + epimeron) of the mesothorax is oval in 

 shajie, and bears about half a dozen small hairs. The episternum of the metatliorax 

 is a small plate with a few hairs ou it. The ejiimeron, however, is large, and bears 

 at its posterior edge two long and one short hairs — a very characteristic feature 

 of the species. At the posterior edge of the seventh tergitc in botli sexes there are 

 one long and two short bristles on each side close to the middle line. The eighth 

 tergite in the ma/c is peculiarly modified, as is shown on Fl. XVI. f. In. The stigma 

 is placed at the base of the dorsal posterior lobe, as I have already mentioned. 

 The eighth sternite in this sex is much reduced, as is shown in the same figure. 

 In the /l'wf//t' the eighth tergite is, as usual, enlarged. Just before the opening of 

 the stigma there are in the present species two small hairs, as is shown on PI. XVI. 

 f. 8. The seventh sternite is much enlarged in the J'emale, and bears in ('. elongatug 

 numerous small hairs. 



Length :i — 32 mm. 



llab. ScotOjiltilKs nortidu, Tring, Cambridge,* and Brigliton.f 



t'urtis, as I have previously notified, described this species. He gives a very 

 accurate measurement of it in his British Entomoloytj, I.e., and further states that it 

 is parasitic ou the yellow bat (^'I'speriKjo nortubi^), its only host. 



Dr. Wagner redescribed this species under the name of ^wioisr/^/a, as mentioned 

 above. 



1 take this opi>ortunity to correct au error of mine in this journal, (uitc, Vol. 11 . 

 1805. p. 00. Here I recorded Cei-utopsylht pcntuctfiiu.f as now to the British list. 

 This species, however, had been previously recorded as British by Mr. Edward 

 Saunders in the Knt. .'Ifoi/. Me//. Q^). HI. p. 00 (lt<!)-.i). 



• Dr. D.iviil .sh.irp ami Mr. William Farren. 

 t Messrs. lirivzcnor Bros. 



