SUMMARY OF CURRENT RESEARCHES RELATING TO 
I. Leptostraca. 
Order 1. Nebaliidze. 
II. Eumalacostraca. 
Order 1. Stomatopoda. 
,, 2. Tlioracostraca. 
„ 3. Arthrostraca. 
The Acerata are divided into two sub-classes ; the first, Gigantostraca 
or Merostomata, contains as order i. the Xipbosura with tbe Limulidm, 
and Hemiaspida for sub-orders, and the Eurypterida ; the second sub- 
class is that of tbe Arachnida, in which eight orders are recognized, 
Scorpionida, Thelyphonida, Araneidae, Solpugida, Pseudoscorpii, Pha- 
langida, and Acarina. 
The second sub-phylum is that of the Insecta or Antennata, and 
contains two classes, the Chilopoda and the Hexapoda, while the third 
sub-phylum is that of the Diplopoda or Ohilognatha. The author is 
uncertain as to the position of the Pycnogonida, Linguatulina, Pauropoda, 
Tardigrada, and Malacopoda ; in using this last name he reverts to 
Blanchard’s name given in 1847 for the group now generally known by 
Moseley’s name of Protracheata. 
a. Insecta. 
Anatomy and Development of Male Genital Armature of Lepi- 
doptera.* — M. A. Peytoureau, who has had an opportunity of examining 
the development of the armature in Bombyx mori , considers that the 
abdomen of male Lepidoptera is formed of ten urites, for the uncus is to 
be regarded as the tenth urotergite and the scaphium as a tenth uroster- 
nite. The penis is placed between the ninth and tenth urosternites. 
Female Genital Armature of Lepidoptera.f — M. A. Peytoureau 
thinks that the more or less complete monographs which have, in recent 
years, dealt with the genital armature of female Insects have not looked 
at the subject from the morphological point of view ; it is necessary to 
study the changes which go on during development. When that is done 
it is found that the abdomen of female Lepidoptera is really composed of 
ten urites ; of these the eighth is generally modified, but is always 
recognizable in the adult ; the ninth is atrophied and united to the tenth, 
and this last is formed by a tergite only. The canal of the copulatory 
pouch, which is chitinized in several species (e. g. Acherontia atropos ) 
opens between the seventh and eighth sternite. The anus and the copu- 
latory orifice occupy the same position as in Orthoptera cursoria, while 
the orifice of the oviduct is distinctly modified. 
Evolution of the Worker-Caste among Ants.J — Prof. C. Emery 
arranges ants in the following series, according to the relations of the 
worker-caste to the rest of the colony. 
I. Ants with only large workers. This is the primitive state, illus- 
* Comptes Rendus, cxviii. (1894) pp. 542 and 3. t Tom. cit., pp. 358-60. 
X Biol. Centralbl., xiv. (1894) pp. 53-9. 
