48 SELECTED NOTES FROM 



Plate XXIV. 



Fig. 1. — Htjpopus muscarum x 250 diameters. The ventral aspect 

 is represented. The legs of the third pair are, as is usual, 

 drawn up, so as to be all but invisible, a.s., abdominal 

 suckers, above which is the vent. 

 ^^ 2. — Gamasus from House-Fly, ventral aspect, x 50 diameters. 

 t.s., thoracic shield; a.s., abdominal shield; v.s., ventral 

 shield ; v. , the vent ; 11. , limbs of the first pair= modified 

 antennae ; in some Gamasi, as the present, these have 

 neither claws nor suckers terminating them, and are 

 strictly organs of touch. I. , labium (=^lower lip) ; l.p. l.p. , 

 labial palpi ; m.m., chelate mandibles. 

 ,, 3 and 4. — The chelate mandibles more enlarged, their direction is 

 vertical, so that of the left side is in its natural position. 

 Fig. 3, by pressure, displays the chelse in profile. 



Plate XXY. 



Fig. 1. — Gamasus coleoptratorum, ventral aspect, x 35 diameters. I., 

 labium; l.p., labial palpus of the left side ; m., mandible of 

 the left side, that of the right side has been displaced ; 11. , 

 limb of the first pair. It will be seen that G. coleoptratorum 

 belongs to a section having the first limbs ambulatory and 

 prehensile, and therefore furnished with claws and suckers. 

 The mandibles by pressure show the lateral aspect ; v. , vent ; 

 v.p., small ventral plate with two minute tactile hairs ; 

 sp. sp., spiracles; a.d.s., anterior dorsal shield; p.d.s.j 

 posterior dorsal shield. 



,, 2. — Chelate mandible more enlarged. 



^^ 3. — Gamasus from Rat, ventral aspect. I., labium; l.p. l.p., labial 

 palpi ; m. , mandibles ; 11. , limb of the first pair ; v. , vent ; 

 v.s., ventral shield; sp. sp., spiracles; a.s., abdominal 

 shield. 

 These plates are all from drawings by Mr. Tuffen West. 



Selccteb IRotea from tbe Socict^'0 

 motc^Booft0. 



BOTANICAL. 



Haematoxyline forms a pretty slide. It is obtained by mixing 

 extract of Log-wood with sand, and digesting this powder for 

 several days with about six times its volume of ether. The 

 liquid is then distilled till the residue assumes the consistence 



