1895.] Entomology. 1111 
ENTOMOLOGY.’ 
Stemmatoiulus as‘an Ordinal Type.—The genus Stemmiulus? 
was established by Gervais in 1844. The type species was collected in 
the mountains of the United States of Colombia. The genus was sup- 
posed to differ from Iulus in the possession of a single large ocellus on 
each side, instead ofa cluster of small ocelli, but to subsequent writers 
this seemed a rather slender basis of generic distinction. Latzel placed 
Stemmiulus as a doubtful subgenus under Iulus. 
Other species with two large ocelli have been described from Jamaica 
and Ceylon by Karsch and Pocock, but no dissections seem to have 
been attempted. Mr. Pocock has given me credit for having pointed 
out to him the fact that the pleural sutures are open, and he has estab- 
lished a separate family for the accommodation of the genus, having 
previously referred it to the Callipodie (Lysiopetalid:e) because the 
ventral plates are free and the segments striate in a manner resembling 
that of some of the European Lysiopetalide. Mr. Pocock also estab- 
lished? a suborder Callipodoidea to contain the Callipodidæ and Stem- 
miulidæ, but seems later on to have abandoned this arrangement, for 
we find both families referred back to the Iuloidea.* 
During the past four year I have had the opportunity of accumulat- 
ing in Liberia abundant material in this group, and have accomplished 
several dissections which reveal a series of remarkable characters, and 
make possible camera drawings of the interesting parts. 
The living animals strikingly resemble in form, size, coloration, 
habits and movements the Iuliform Craspedosomatide, such as Crypto- 
trichus and Underwoodia. No Craspeddsomatide are, however, found 
in tropical Africa, so that mimicry will hardly explain the apparent 
similarity of these really diverse forms. The movements, indeed, are 
even more vigorous than those of Craspedosomatide, and the creatures 
frequently throw themselves several inches when disturbed. Mr. 
1 Edited by Clarence M. Weed, Durham, N. H. 
* This is the original name, and the derivation from ot¢#a is evident, but the 
form seems to be incorrect. A similar carelessness in derivation is that of the 
names ‘‘ Craspedosomide ” and ‘“Chordeumide,”’ which classical usage would 
compel us to write “ Craspedosomatide ” and “ Chordeumatide.” 
Journ. Linn. Soc. Zool., XXIV, p. 447. 
*Zool. Erg. einer Reise in Niederl. Ost-Indian, Herausg. von Dr. Max Weber, 
p- 376. As this reference cites the former one (Journ. Linn. Soc., XXIV, p- 
447) it would seem to bea later publication. 
