676 MR. E. J. MIERS ON A COLLECTION OF [JunC 19, 



PoRCELLio, Latr. 



PORCELLIO SWAMMERDAMII. 



Porcellio swammerdamii, Audouin, Explic. des Planches de Savigny, 

 Egypte, Crust, pi. xiii. fig. 6, p. 98 (1809). 



Porcellio alexa7\drinus,^vsLnAt, Conspectus Monogr. Onisc. p. 180 

 (1832) ; M.-Edw. Hist. Nat. Crust, iii. p. 172 (1840). 



Hab. Egypt. 



In the single adult example (length nearly 5 lines) the colour is 

 deep blackish-brown ; in this specimen the flagella of the external 

 anteunaj are missing. The other specimens are much smaller, and 

 of a much lighter brown colour. They agree well with Savigny's 

 figure of the species, except that the granules are less strongly marked. 



Subgenus Porcellionides. 



Porcellio hispida, sp. n. (Plate LXVIII. fig. 5.) 



Convex, elongate, oval-oblong, everywhere closely covered with 

 minute stiff hairs (which under a low magnifying-power might be 

 mistaken for granules). Head small, transverse, antero-lateral lobes 

 broad, prominent, rounded, and obtuse. Segments of the body all 

 rounded at the junction of the anterior and lateral margins, postero- 

 lateral angles of the first three segments of the body obtuse and 

 rounded, of the remaining segments subacute ; posterior margin of 

 the seventh segment concave, and slightly sinuated on the sides. 

 Segments of the tail short and bent backwards on the sides, postero- 

 lateral angles acute ; terminal segment triangular, with the sides 

 slightly concave, subacute at the extremity. Antennae short, the last 

 two joints (flagellum) together shorter than the antepenultimate 

 joint, the terminal joint a little longer than the penultimate joint. 

 Uropoda short ; the terminal about twice the length of the penulti- 

 mate joint, and projecting for about half its length beyond the 

 terminal segment. Colour light brown and light yellow variegated. 

 Length 5^ lines, breadth 2^ Hues. 



Hab. Mongolia. 



This species is remarkable for the minute stiff hairs which clothe 

 the narrow oblong body, the small size of the rami of the uropoda, 

 &c. 



Family Cymothoid^. 



LiRONECA, Leach. 

 Lironeca daxjrica, sp. n. (Plate LXIX. fig. 4.) 

 Broadly ovate, depressed. Head very small ; front prominent, 

 rounded, and concealing the bases of the antennae, but not inflexed. 

 Eyes small, red. First segment of the body rather the longest, 

 anterior margin concave, v/ith scarcely any trace of antero-lateral 

 lobes. Following segments with the coxae small, and inserted in 

 front of the antero-lateral angle of the segment, postero-lateral angles 

 of all the segments rounded ; last segment very short, and almost 

 seniicircularly excavated. Tail small, of equal width throughout, 

 not half the width of the third segment of the body ; terminal seg- 

 ment but little broader than long, smooth, with the posterior margin 



