168 T. THORELL, 
Koc :), given by KocH as typical of Diplura. Also Mygale luctuosa Lu- 
cas from Spain, which is said to be very closely allied to D. (AL) Calpetana, 
and to have the superior spinners about as long as the abdomen, appears 
to belong to this genus; but Lucas does not state of how many joints these 
spinners consist ?). 
Gen. 5. TRECHONA (C. Koch). 1850. 
Deriv.: roéyo, run. 
Syn.: 1805. Mygale Warck., Tabl. d. Aran., p. 59 ("2* Fam. Les Digitigrades inevmes " 
ad partem). 
1850. Trechona C. Kocm, Uebers. d. Arachn.-Syst., 5, p. 74 (saltem ad max. part.). 
1864. Mygale: sub-gen. Pexionyx [Pezionyx] Sm., H. N. d. Araignées, p. 64, 68 
(ad partem). 
? 1864. = sub-gen. Eurypelma 1D., ibid., p. 66 (ad partem). 
Type: Trechona Valentina (DUF.). 
Some of the species classed by C. Kocx under this genus, are by 
SIMON referred to the sub-genus Zurypelma (” groups” ÆEurypelma and La- 
siodora) — whether rightly or not, I cannot venture to decide. In the spe- 
cies which we assign to Trechona, as e. g. 7. (Mygale) Valentina (Dur. 
the superior spinners have but 3 distinct joints ?), which distinguishes them 
from the preceding genus, Diplura. 
[Gen. 6. AVICULARIA (Law) 1818. 
Deriv.: avicularius (bird-keeper), in the signification adopted, bird-catcher. 
Syn.: 1805. Mygale WaLck., Tabl. d. Aran., p. 5 ("1* Fam. Les Plantigrades" ad maa. 
part.). 
1818. Avicularia Lamarck, H. N. d. Anim. sans Vertèbres, V, p. 107 (ad partem). 
1830. Theraphosa [Teraphosa] Ercmw., Zool. spec., II, p. 73 (ad partem). 
1850. Eurypelma C. Koch, Uebers. d. Arachn.-Syst., 5, p. 73 
1850. Lasiodora ID., ibid., p. 72 [ichs ad maz. 
1850. Scurria ID., ibid., p. 74. | part.). 
1850. Typiochlæna 1D., ibid., p. 75. 
?1850. Trechona ID., ibid., p. 74 (ad partem). 
1804. Mygale: sub-gen. Eurypelma Sim., H. N. d. Araignées, p. 64, 66 (ad max. 
1 j arte part.). 
Type: Avicularia vestiaria (DE GEER). 
1) Die Arachn., IX, p. 38, Taf. CCC, f. 715. 
2) Conf. Lucas, Note sur une nouv. esp. d'Aran. qui habite l'Esp. mérid., p. 17. 
3) Durour, Observ. sur quelques Arachn. quadripulm., p. 100, 102. 
