BIOLOGY. 
Ins . 79 
II. — BIOLOGY. 
Subject Index to the Various Departments. 
N.B. — The constantly increasing number of memoirs on various points of 
Biology has rendered necessary some modifications of the arrangement, and a 
more elaborate system of subdivisions has-been adopted. The comparatively small 
sections of Economic entomology and Bibliography, as woll as Distribution, are 
now placed under the general heading “ Biology,” as sections thoroof. 
Advantages of hypothesis in advancing entomology, Meldola (759). 
Anatomy and Physiology. 
Comparative and Morphology. 
Morphology of the insect body, number and nature of segments, head, 
hypopharynx, origin of antennae, cerci, &c., Heymons (503) ; summary, 
Ent. Nachr. xxi, p. 287. — General considerations on the morphology of 
insects, Feytoureau (863), pp. 191-222.— Morphology of abdomen and 
genitalia, see Sexual Organs , p. 81. 
General ( comprehensive ) and External. 
General anatomy of Thysanoptera t \J7,v.L (1157). — Anatomy of Coccidce , 
Berlese (102). — Anatomy of head and honey-tubercles of Aphididce, 
Mordwilko (788). — Anatomy of larva of Syrphus , Vine, Int. J. Micr. 
v, pp. 33-42, 121-134, pis. iii, iv, viii & ix. — Anatomy of nowly-lmtchcd 
larva of Odonata , Calvert (177). — Elomonts of anatomy : outlinos for 
students of the Cornell University, Comstock & Kellogg (246). — 
Sketch of external and internal structure, Sharp (1055), chapp. iii & iv. — 
Cerci and styles, generalisations, Veriioeff(1166). — Ovipositor, see Sexual 
Organs , p. 81. 
Homologies of the parts of labium and maxillae, and submentum, 
Waterhouse (1196). — The mouth of Thysanoptera , Bohls (123). 
Structure of mouth of Hemiptera, Marlatt (727). 
Trophi of Lepidoptera , Kellogg (583). 
External anatomy of thorax of Lepidoptera , Kellogg (582). 
Structure of mouth of Gyrinus larva, Meinert (758). 
Structure of the tibia and comb in ants, Janet (560). 
Wing-venation discussed, Comstock (244) ; Kellogg (586) ; Packard 
(834). 
Structure of scales of Lepidoptera , &c., Spuler (1096). — Structure of 
Lepidopterous scales, their relation to hairs, Ingpen (541), Munney (810). 
Setae of Lepidopterous larvae : their position, &c., Dyar (313). 
Histology of the epidermic cells, Chatin (199, 200). 
Nature of wings and abdominal appendages, Jaworowski (562). 
Mechanics of eedysis, Verson (1170). 
Flight and pedestrian movement of insects, Marey (724). 
