.) ARANEIDEA. 
Group PACHYLOMEREZ. 
The two genera falling into this group, of which examples are recorded from Central 
America, are Chorizops and Pachylomerus, Chorizops having been instituted by 
Ausserer for the reception of a form called by Koch “ Actinopus loricatus.” What 
this particular species may be we cannot of course say positively in the absence of 
types, except that it approaches, in all probability, the genus Cyclocosmia of Hentz. 
Assuming this to be the case, we may therefore characterize the two genera thus :— 
1. Abdomen enlarged, truncate, and marked with very distinct muscular 
depressions behind . . ... . . . . . CHorizops, Auss. 
2. Abdomen not enlarged, truncate, or inatked with ateonply pronounced 
muscular depressions behind . . . . ... =.=. +. +. +. . . Pacnyztomervs, Auss. 
CHORIZOPS. 
Chorizops, Ausserer, Verh. zool.-bot. Ges. Wien, xxi. p. 144 ae? 1). 
Type Chorizops loricatus (C. Koch). 
1. Chorizops loricatus. 
Actinopus loricatus, C. Koch, Die Arachn. ix. p. 99, fig. 752 (1842) °. 
Chorizops loricatus, Ausser. Verh. zool.-bot. Ges. Wien, xxi. p. 144 (1871) *; Simon, Act. Soe. 
Linn. Bord. xliv. p. 827 (1892) *. 
Hab. Mexico}. 
This spider, judging from Koch’s figure, closely resembles Cyclocosmia truncata, 
Hentz, but the position of the eyes would preclude the possibility of identity. It is 
not possible, however, to say anything more definite without seeing the types. 
PACHYLOMERUS. 
Pachylomerus, Ausserer, Verh. zool.-bot. Ges. Wien, xxi. p. 145 (1871). 
Type P. nidulans (Fabr.). 
Tarsi 3-clawed, no ungual tuft(¢). Protarsi and tarsi i. and ii. regularly, thinly, but entirely scopulate. 
Tibia iii. compressed at the base above, incrassate at the apex. Eyes forming a single group. Mandible with 
apical rastellum. Coxa of pedipalp not produced into a conical prominence at the anterior apical angle, 
1. Pachylomerus pustulosus. 
Pachylomerus pustulosus, Becker, Compt. rend. Soc. Ent. Belg. xxii. p. cxl (Oct. 1879) *; E. Simon, 
Act. Soc. Linn. Bord. xliv. p. 827 (1892 ?. 
Hab. Mexico, Guanajuato (Van Bruyssel ). 
This and the following species are unknown to me. 
