40 ARANEIDEA. 
coloration is precisely the same, and it is curious to note that the dorsal row of short 
oblique bars on the abdomen is characteristic also of members of a totally different 
family, whose habits are, however, remarkably similar, namely, the Agelenidee—with 
the common A. labyrinthica as an example. 
The double row of teeth on the fang-groove, the cuspulate labium, the approxi- 
mately equal size of the anterior row of eyes in the female, and the development of 
tibia i. instead of tibia ii. in the male, will suffice for the distinguishing of all the true 
Ischnothele. 
Several females and one adult male were taken by Mr. Sarg. 
The following genera and species of Mygalomorphe have been described from Central 
America; but as there is some doubt about their true affinities, I prefer to place 
them here :— 
TAPINAUCHENIUS. 
Tapinauchenius, Ausserer, Verh. zool.-bot. Ges. Wien, xxi. p. 200 (1871). 
Tapinauchenius reduncus. 
Tapinauchenius reduncus, Karsch, Zeitschr. f. ges. Naturw. liii. p. 887 (3d 3) (1880) '. 
Hab. Costa Rica (Hoffmann, in Mus. Berol.*). 
ISCHNOCOLUS. 
Ischnocolus, Ausserer, Verh. zool.-bot. Ges. Wien, xxi. p. 184 (1871). 
Ischnocolus sericeus. 
Ischnocolus sericeus, Auss. Verh. zool.-bot. Ges. Wien, xxv. p. 169 (1875) *; E. Simon, Act. Soc. 
Linn. Bord. xliv. p. 329 (1892) ?. 
Type, 9, in coll. Keyserling (but not in coll. Keyserling in Brit. Mus.). 
Hab. Mexico, Yucatan ! 2. 
Tam inclined to suspect that this spider will prove to be merely the young of some 
species of HKurypelma or other genus, for Ausserer himself says, ‘‘ wahrscheinlich ein 
junges Thicr.” 
| CYCLOSTERNUM. 
Cyclosternum, Ausserer, Verh. zool.-bot. Ges. Wien, xxi. p. 192 (1871). 
Cyclosternum obscurum. 
Cyclosternum obscurum, EK. Simon, Act. Soc. Linn. Bord. xliv. p. 331 (1892)'. 
Type, 2, in coll. E. Simon, Paris. 
Hab. Mexico}. 
