EUCTENIZA. 13 
opposite coxe i. ; base of labial plate defined by a deep procurved impression. Centre of sternum with a 
very shallow quadrate impression just behind the middle. 
Coxa of pedipalp twice its breadth, anterior distal angle slightly produced, entirely but sparingly studded with 
minute cuspules over anterior side of disc, more concentrated at anterior basal angle. Labial plate as long 
as broad, semicircular, studded towards apex with 6 or 7 cuspules. 
Tarsal claws. Pedipalp with one claw, having one small denticle towards apex and a large bifid basal tooth. 
Legs with three tarsal claws, inferior simple, superiors with one or two smaller denticles towards apex 
and a larger bifid basal tooth *. 
Hab. Mexico}. 
The type, from which the above fresh description is taken, appears to be immature ; 
this would account for the very scanty tarsal scopula. 
2. Eucteniza relata. 
Favila relatus, O. P.-Cambr. Biol. Centr.-Am., Arachn. Aran. p. 156, t. 19. figg. 6, 6a-6f(3)’: 
Type, ¢, in coll. Godman & Salvin. 
Hab. Mexico, Amula in Guerrero, 6000 feet (H. H. Smith 1). 
This species, of which a single specimen, a male, was obtained by Mr. H. H. Smith, is 
undoubtedly congeneric with Eucteniza mexicana, Auss., so far as a careful comparison 
of the types justifies one in concluding. 
Fam. THERAPHOSIDA. 
The sense in which I use this family name, as distinct from the Ctenizide and 
Dipluride, is one in which all the groups embraced by M. Simon [Hist. Nat. Ar. 
p. 132 (1892)] in his subfamily Aviculariine are included, thus covering the whole 
Neotropical and Oriental regions. 
The family will in all probability fall eventually into various natural subfamilies, of 
which the only one that here concerns us, the Theraphosine, may be regarded as 
including all the closely allied genera indigenous to the Neotropical region. The 
principal of these are Eurypelma, Avicularia, Tapinauchenius, Homeomma, Lasiodora, 
Aenesthis, Sericopelma, Spherobothria, Metriopelma, Crypsidromus, &c. 
There appears to be no sufficient reason, so far as the material to hand enables one 
to judge, for drawing very hard-and-fast lines between the numerous forms included in 
the subfam. Theraphosine, based on the division of the tarsal pad or the presence of 
the femoral pad, and certainly not on the extent of the scopulation of protarsus il. 
(Homeomma). 
I am so far unable to satisfy myself that either Ischnocolus, Auss., Chaetopelma, 
Auss., or Cratorrhagus, Simon, whose types are Eastern forms, have really any 
genuinely congeneric representatives in the West. So much confusion has arisen 
owing to a character, found commonly in immature forms, having been seized upon as 
* T am unable to confirm by careful examination of the type specimen the figures of the tarsal appendages 
given by Ausserer. 
