CRUSTACEOLOGV. 



421 



Arachni- 

 des 



My gale faciata, Latreille. 



Mi/gale faciee, Walckenaer, p. 4. 



Said by Seba, who has given a figure of this species, 

 (torn. i. tab. 69- fig- 1.), to be a native of Ceylon. 



** Apex of the mandibular furnished with a rostel- 

 lum ; palpi and tarsi without any scopa. 



Sp. 5. Ccementaria. Rusty brown coloured ; mandi- 

 bules blackish, the border and carina of the thorax 

 paler ; each rostellura with five elongate nearly equal 

 teeth. 



Mi/gale ccementaria, Latreille. 



Mygale macoime, Walckenaer, p. 5. 



Inhabits the South of France. See Linnean Trans- 

 actions, vol. ii. pi. 17- fig. 4. 



Sp. 6. Sauvegesii. Obscure • brown ; each rostellum 

 with four short unequal teeth. 



Aranea Sauvagesii, Rossi (Fauna Etruscana, torn. ii. 

 tab. 9. fig. 11.) 



Mygale pionnicre, Walckenaer, p. 5. 



Mi/gale Sanvegesii, Latreille. 



Inhabits Corsica and Italy. 



B. Nails of the tarsi armed with toothed combs be- 

 low. 



Sp. 7. Calpeiana. Brownish colour. 



Mygale calpeiene, Walckenaer, p. 5. 



Mygale calpeiana, Latreille. 



Inhabits France. 



To this division of the genus belong also Mygale no- 

 tasiana of Walckenaer. 



Genus XXVII. Atypus, Latr. Oletera, Walclc. 

 Aranea, Rcem. 



Lip very small and quadrate, inserted under the base 

 of the maxillae. 



Palpi inserted at the external base of the maxillae. 



Sp. 1 . Sulzeri. Black and shining ; mandibulae very 

 strong ; thorax nearly quadrate ; plain behind, abrupt- 

 ly elevated before ; the two middle eyes placed on an 

 eminence; back of the abdomen leathery or coriaceous, 

 and more shining; the juncture of the joints of the 

 feet white. 



O/elere difforme, Walckenaer, p. 7. 



Atijpus sulzeri, Latreille. (Gener. Crust, et Ins. vol. i. 

 tab. .5. fig. 2.) 



Inhabits France ; has been once found in England 

 by Mr Leach, who still has the specimen in his pos- 

 session, although in a very mutilated state.* It was first 

 described by Latreille in the Nouvcau Dictionnaire d'Hist. 

 Nat. torn. xxiv. table page 133. under the name Atype, 

 which having the right of priority over that given by 

 Walckenaer, we have retained. 



Genus XXVIII. Eriodon,L«/>\ Missulena, Walclc. 



Lip linear exserted between the maxillee. 



Palpi inserted as in the genus Atypus. 



Sp. 1. Occatorius. Colour unknown. 



Eriodon occatorius, Latreille. 



Missulene herseuse, Walckenaer. 



Genus XXIX. Segestria, Latr. Walck. Aranea, 

 Linn. Fab. Rossi. 



Maxilla straight, longitudinal, with the base thick- 

 ened, dilated externally, somewhat wedge-shaped, the 

 middle longitudinally convex. 



Lip elongate-quadrate, longer than broad, the middle 

 longitudinally convex, and somewhat carinated. 



Feet, the first pair longest, next hi order the se- 

 cond, then the fourth; the third pair being short- 

 est. 



Cellaria, 



Sp.l. Cellaria. Brownish-black, obscurely cinere- 

 ous-silky ; mandibules green ; the breast and base of 

 the feet brown. 



Aranea Jlorentina, Rossi. (Fn. Etrus. torn. ii. p. 133. 

 tab. 9. fig. 3.) 



Segestria perfida, Walckenaer, p. 48. 



Segestria cellaria, Latreille. 



Inhabits fissures in old buildings and rocks, spinning 

 a silky tube. The genitalia of the male resemble those 

 of Mygale avicularia. 



It is not uncommon in France and Italy ; but in this 

 country it seems to be rare, only one specimen, Ave 

 believe, having been met with, which was taken by a 

 dealer in natural curiosities in a cellar at Plymouth, and 

 is now preserved in the collection of Mr Leach. 



Sp. 2. Senoculala. Thorax blackish brown ; abdo- Senocuia;*, 

 men oblong, grey, with a longitudinal band of black 

 spots ; feet light brown, with obscure fasciae. 



Aranea senoculala, Linn. Fabr. 



Segcstrie senoculee, Walckenaer, p. 48 ; Fourcroy. 



Segestria senoculala, Latreille. 



Is found in the same situations as the last species. A 

 good figure is given in Lister's work on British spiders, 

 p. 74. titul. 24. fig. 24. It has been bred from the egg 

 by Mr Leach, who observed a very curious fact in the 

 colour of this animal, viz. the bands on the feet are 

 much more distinct in the young than in the full grown 

 animal, so much so, indeed, that had he not known 

 the eggs to have been deposited by this species, would 

 probably have considered it as a very distinct species ; 

 but having an opportunity of rearing them to the full 

 size, all doubts on the subject vanished. 



Genus XXX. Dysdera, Latreille, Walckenaer. Ara- 

 nea, Fourcroy. 



Maxilla straight, longitudinal, with the base thick- 

 ened ; externally dilated at the insertion of the palpi ; 

 the apex internally obliquely truncated, and thence ex- 

 ternally acutely terminated. 



Palpi with the first joint very short and nearly ob- 

 solete. 



Lip, elongate, quadrate, gradually narrowing to- 

 wards the point. 



Feet, first pair, then the fourth, afterwards the se- 

 cond, longest ; the third pair shortest : a little scopu- 

 la under the tarsal nails. 



Sp. 1. Erythrina. Mandibules and thorax blood- 

 red; the feet lighter coloured; abdomen very soft, grey- 

 ish yellow, and silky. 



Aranea erythrina, Fourcroy, Fauna Parisiensis. torn, ii, 

 p. 224. 



Drysdere eythrine, Walckenaer, p. 47. 



Drysdera erythrina, Latreille, Genera Crust, et Ins. 

 torn. i. tab. 5. 



Inhabits France and England under stones. It is 

 not common in this country ; it has been observed by 

 Mr Leach near Exeter and London, four or five times, 

 Aranea hombergii of Scopoli (Entomologia Carhiolica, 

 No. 1119.) is merely a variety of this species. 



Observation. To this genus, Aranea rttfipes of Fa» 

 bricius, (Entomologia Systematica, torn ii. p. 42(i.), 

 seem to belong, as appears from his description: "Head 

 and thorax obscurely ferrugineous, and immaculate, eyes" 

 six, placed near together ; abdomen ovate, cinereous 

 immaculate. Feet bright red." — " Inhabits Morocco." 

 Latreille supposes this may be even the same specie? 

 with erythrina, as we are unacquainted with the Fa* 



SO. Dvs> 



DERA. 



Erythrina. 



* Two other specimens have bten since 'aken, one by Mr Standitch of Walworth, the other by Mr Tuther, optician, Loitdo • 



