400 The American Naturalist. [ April, 
ENTOMOLOGY: 
Termitophilous Insects.—E. Wasman has lately described’ a 
number of new termitophilous insects, erecting for part of them the 
genus Termitobia and has summarized our present knowledge of the 
guests of termites. He says that very little is known concerning the 
guests of the termites as compared with those of ants, largely because 
the former are chiefly confined to the tropical and sub-tropical regions 
and also because the investigation of their nests is more difficult. But 
in spite of this more than fifty species of termitophilous animals are 
known. Of these forty belong tothe Coleoptera, two to Orthoptera, 
one to Heteroptera, one to Lepidoptera, two or three to Thysanura, 
one to the mites (Acaroidea), one to the Arachnida, and one is a Nem- 
atode. Of the beetles one is a species of Glyptus with its larva, and 
thirty-nine are Staphylinidæ.. The author refers to the investigations 
of Mr. E. A. Schwarz in North America.’ 
Notes on the Mouth Parts and Thorax of Insects and 
Chilopods.—The difference between the mouth parts of true insects 
and Chilopods are usually mentioned in text-books. But when one 
believes that insects must have come from some form similar to living 
Chilopods, it becomes a matter of interest to see what is the homology 
between the various parts of the mouth. As it is usually stated, Chilo- 
pods have one pair of mandibles, two pairs of maxilla, and a pair of 
maxillipeds ; insects a pair of mandibles, one pair of maxillæ, and a 
labium. The mandibles are of similar structure in both groups. In 
Chilopods the first pair of maxillz are two-lobed; the second pair of 
maxillz, or first pair of legs (as it is sometimes called), is, in struc- 
ture, like a pair of legs; the maxillipeds are a modified pair of legs, 
large and powerful, used for seizing the prey. The dorsal scuta of the 
segment to which the maxillipeds belong is frequently not wholly 
united to the head, but is plainly visible (Lithobius). 
We here see what is well-known among the higher Crustacea; the 
tendency to the cephalization of thoracic segments in order that their 
appendages may function. as mouth parts. If such is the case, what 
‘Edited by Clarence M. Weed, Hanover, N. H. 
*Neues Termitophilen, mit einer Uebersicht über den Termitengiste. Verhandl. 
Zoologisch botanish Gesellsch. in Wien, xli, 647. 
Proc. Ent. Soc. Wash., i, 161. 
