ARTICULATA. 125 



including the rostrum and the four anterior feet. The larvae have six feet^ 

 and resemble small drops of red sealing wax affixed to the legs and other 

 parts of Phalangium (2)1. 77, Jig. 62) and various insects. These were 

 once considered to be a distinct genus, nnder the name of Leptus. 



Ordek 3. Adelakthkosomata. The animals of tJiis order respire by 

 tracheee, and have cheliform mandibles. They are included in the three 

 families : Phalangiidce, Cheliferidce.f and Galeodidce. 



Fam. 1. PJialangiidcB {p>l. 77, Jigs. 62, 63). This iamily includes the 

 slender footed spider-like animals known as harry-long-legs. The mandibles 

 are cheliform and the palpi filiform, the eyes two, central, and near 

 together, and the abdomen annulate and closely united to the ce^jhalothorax. 

 They feed upon small insects, avoid the full glare of the light, and are 

 harmless, except that some of them have tlie power of exuding a disagreeable 

 scent when disturbed. The slender feet are much like antennie, the tarsus 

 being in some cases composed of fifty articulations ; and when the animal is 

 standing or walking, several of the feet are held up or moved about, as if for 

 the purpose of feeling and ascertaining the presence of objects. Some 

 authors place the PJudangiidce in one order, and the remaining families 

 (including the Scorjnonidce and Phrgnida-) in another, under the name of 

 ISolifugce. 



Fam. 2. Clieliferidae. The genus Chelifer ^pl. 77, Jig. 48 a., natui-al 

 size, and 61, natural size) is remarkable for the large cheliform palpi 

 resembling arms, which give the species the appearauce of minute scorpions, 

 except that they have not the tail of the hatter. They feed upon minute 

 ani nulls, living in the woods or in houses, especially among books (as noticed 

 by xiristotle), where they are rather beneficial than hurtful. They run 

 rapidly backwards, forwards, or sideways, like the crabs ; tliey are oviparous, 

 have two or four eyes upon the cephalothorax, an annulate abdomen, and 

 the eight feet are of equal size. Say describes two species inhabiting the 

 United States. 



Fam. 3. GaleodidcB. Gcdeodes {pi. 77, Jigs. 49, 50). The animals of 

 this family resemble large hairy and fierce looking spiders. The palpi are 

 long and resemble feet, and the abdomen has nine or ten articulations. The 

 generic name Galeodes was proposed by Olivier, in 1791, and Solp>uga by 

 Herbst, in 1797, according to Agassiz' Nomendatoi\ so that the former has 

 priority. The two terms are, however, used by Koch for different genera. 

 The body is divisible into head, tliorax, and abdomen, and the eyes are 

 situated upon the head. The first pair of feet, as well as the palpi, are 

 without nails, although the remaining feet have them.' Tliey run with great 

 agility, and when interrupted they stop, raise the head, and place themselves 

 upon their posterior feet in a menacing attitude. Lucas, who was sent by 

 the French Government to investigate the entomology of Algeria, says, that 

 when about to catch one of them, it leaped upon his arm and bit the sleeve, 

 maintaining its hold until it was secured. According to Captain Hutton's 

 observations, these animals are probably not poisonous, as a lizard bitten by 

 one of them did not die. Another lizard three inches long, exclusive of the 

 tail, was almost entirely devoured by one of them, which gorged it so much 



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