( 539 ) 



bristles appears to vary slijihtly iUTunliiig' to iinlividuals. At the posl(M-ior edf^es 

 of tlic first, secoiiil, thiid, and fourth tergitrs there is a small sjiiae jilaced close to 

 the middle line on each side. At the i)ostorior edge of the seventli tergite there are 

 on eaeh side close to the middle line one long and two short bristles. 



The enlarged eighth steruite in the imih: bears about seven small and three large 

 bristles. At the ])osterior end of the boomerang-shaped ninth sternite there are 

 about four long and five short bristles. The eighth tergite in \\wj'i'inule is, as usual, 

 much enlai'ged; it bears nine hairs near its ventral edge. 



The coxae of the forelegs are eoverc^d witli numerous bristles on their outer edge. 

 The tibiae have at their posterior edges seven pairs of strongly ehitinized bristles. 

 The inner bristle of the second, fifth, and seventh pair is longer than the others. On 

 the outside of the tibiae there is a series of seven smaller bristles. The midiUe 

 and hind legs are similar in structure to the first, but the coxae are j)ractically 

 naked. 



Length 2"2o — '2-'-M> mm. 



lldlj* IbjpadaeiM ylareolus, Tring, Xorth Eerwick, and Hanover ; Mas sil- 

 caticus, Tring; Mug musculm, Tring; Arcicola amphibius., Tring and Brighton f ; 

 Sorex calguris, Tring ; Crossopus cilidtus, Wick ; Talpu europaea, Tring, Box- 

 worth, | etc.; MiDstela valgaris, Triug; Mustela ptitorias, Aberystwyth. § 



2. Typhlopsylla agyries nobilis subsp. nov. 



This form agrees in every resi>ect with the type, one character excepted. The 

 subsjiecies shows a tendency to lose one of the genal sjjines on each side. In a 

 series of over thirty examples of tliis flea IVum its host, nearly every specimen has 

 lost one or two genal spines on one side. In several cases one from both genae has 

 disa])pcared. 



llnlj. Arcicola uiiiphibius, Tring: Brighton, f 



The present species, as I have previously stated, was described by Dr. Heller 

 in Is'.H). Thu two type-specimens, both nudes, were given him by Professor O. 

 iSchneider, who caught them on the Island of Borkum, where they were found in the 

 sand. (Since then, however. Dr. Heller has received a further supply of this insec't 

 from the same locality taken from Arcicola arcolis. 



At the request of Dr. Heller I undertook to investigate the species, and for this 

 purjxjse he most courteously presented me with two examples. 



Dr. Heller's species I found to be identical with the English insect which 

 Mr. Edward Saunders introduced into the British list as 7}/p/>lops>/llfi assimilis 

 Taschbg. 



In /'/(■ Flohe, jip. 9o, Viti, Dr. Taschenberg diagnoses his TijpIdopsijUu 

 assimilis as having eighteen teeth in tin; prt)notal I'omb, and a "boot-shaped" 

 genital organ in the male. Dr. Heller dilferentiated his species from the 

 assimilis of Dr. Taschenberg by its prouotal comb consisting of sixteen teeth 



* Refers to speciineus iu my collection only, throughout the present article. 

 t Mes.sr.s. lirazenor Bros. 

 X Mr. William Fiurcii. 

 5 Mr. George Davis. 



