578 CLASS ix. 



This family unites some characters of the third family with others 

 of the fifth. The larvae, or the imperfect young animals, have 

 only six feet. Here belongs the genus Caris of LATREILLE, which 

 contains mites that live on bats, probably young individuals of 

 Dermanyssus. 



Uropoda LATR. Body depressed, with dorsal shield orbicular. 

 Peduncle deciduous, infundibuliform at the posterior part, serving for 

 fixing the body. 



Sp. Uropoda vegetans, Mitte vegetative DE GEEK Mem. vii. PI. 7, figs. 1519 : 

 KOCH in HERRICH-SCH.EFFER Deutschl. Ins. Heft 188, Tab. 19 ; GUERIN 

 Iconogr., Arachn. PI. v. fig. 10 ; parasitic on beetles. GERVAIS mentions 

 some other species, Apteres, in. p. 221. 



Pteroptus LEON-DUFOUR, Celeripes MONTAGU, Spinturnia V. 

 HEYDEN. Body depressed. Palps with last joint longer, oval. 

 Feet thick, with joints short. 



Sp. Pteroptus vespertilionis, HERMANN Mem. Apter. PI. i, fig. 14, KOCH in 

 HERRICH-SCH^EFFER Deutschl. Ins. Heft 167, Tab. 23, parasitic on Vesper- 

 tilio noctula; the same or a nearly allied species occurs on Vesp. serotinus. 

 See on other species KOCH 1. 1. Heft 137 and 188, who joins this and the 

 preceding genus to the Sarcoptides (our Acarea). 



Argas LATR. Bostram inferior, concealed under the margin oj 

 body produced. First joint of palps longer than the rest. Feel 

 approximate at the insertion, biunguiculate, with caruncle none 01 

 indistinct. 



Sp. Argas reflexus LATREILLE, Argus reflexus FABR., Ehynchoprion columba 

 HERM. Mem. Apt. Pl/4, figs. 10, n, KOCH in HERRICH-SCH^FFER Deutschl. 

 Ins. Heft 189, Tab. i ; found in France, Italy, &c. on pigeons. A species 

 occurring in Persia, lives in houses, and by its puncture occasions in mar 

 convulsions, delirium, and sometimes, as is asserted, even death : Argut 

 persicus FISCHER, GERVAIS AptZres, in. pp. 229 231, PL 33, fig. 6. 



Holothyrus GERV. 



Consult GERVAIS Apteres, in. pp. 233. Is this its place ? 



Dermanyssus DUGES. Last joint of palps very small ; labium 

 acute ; mandibles in males chelate, with outer finger very long, in 

 females ensiform. Body soft. Anterior feet elongate ; last joint oi 

 feet furnished with caruncle bilobed and two claws. 



