370 DR. JOHNSTON ON THE ACARIDES OF BERWICKSHIRE. 



cealel under the venter;* but the fore legs are always ex- 

 tended and curve inwards on the mouth. The bristles of the 

 body are rather long, smooth, straight and setaceous ; the 

 skin corneous. 



I find this species abundantly in hot-beds, and in warm 

 borders of gardens. It is nioderately quick. In one speci- 

 men there was a long gummy thread attached to the anal 

 pore, which is situated near the posterior margin of the ven- 

 ter. It is nearly allied to Uropoda vegetans. 



26. SciRUS VULGARIS, Hermann. 



Bd. coccinea setosa long^ rostrata, palporum articulo ex- 

 tremo obconico 2do. multo breviore et setis duabus praelongis 

 terminato. Long. J lin. — Scirus vulgaris, Herm. Mem. Apter. 

 61, pi. 8, fig. 9, and pi. 9, fig. S.— Bdella rubra, Latr. Gen. 

 Crust, et Insect, i. 154, and in Cuv. Reg. Anim. iv. 287, (in 

 part). Lam. Anim. s. Vert. v. 55. — Bd. longicornis, Gerv. and 

 Walck. Ins. Apt. iii. 156, (in part). — Bd. vulgaris, Koch 

 Uebers. p. 74. 



Desc. Mite minute, of a uniform scarlet colour. After 

 death the body becomes dark blood red, the legs retaining 

 their red colour : Body ovate-elliptical with a long porrect 

 rostrum, roughish, sparingly hispid, distinctly divided into 

 head, thorax and abdomen : Head rostrated, the rostrum 

 elongate-triangular, as long as the diameter of the thorax, 

 armed on both sides with several rather long curved bristles 

 in opposite pairs, the apex divided bifidly and fringed with a 

 series of sharp short setae : Thorax equal in length and 

 breadth with two long moveable bristles on its back towards 

 the sides : Abdomen slightly notched at its junction with the 

 thorax, rounded behind and sparingly bristly, marked with 

 four foveolse on each side of the back which is hence rather 

 uneven and plano-convex : Palpi much slenderer than the 

 legs, geniculate, arising from about the base of the rostrum, 

 and exceeding it in length, 5-jointed, the basal joint minute, 

 the 2d greatly elongated and claviform, the 8d small, 4th mi- 

 nute, the 5th pearshaped, obtuse, armed with two very long 

 bristles on the apex, and with two much shorter and unequal 

 bristles underneath ; the other joints have only a few scatter- 

 ed very short setae : Legs 8, homologous, about the length of 



• "In quieta corpori infero appressi, complicati." — Latreille. It reminds 

 one of Gyrinus natator. 



