ORISM0L0GY. 313 
to a particular section in any genus or tribe. As, the 
impressed lateral puncta on the thorax of Scarabceidce ,- 
the lateral furrows and dorsal channel in the ground 
beetles (EutrecJima), and the spots in the primary win^s 
of Xylina Polyodon and affinities a . 
SYMBOLS. 
Male J. Female ? . Neuter ? . Egg 0. Larva©. Pupa ]> . 
Imago©. Head A. Trunk D. Abdomen v b . 
B. PARTIAL ORISMOLOGY. 
I. BODY (Corpus). 
1. Disjunct (Disjunctum). When head, trunk, and 
abdomen are separated by a deep incisure. Ex. 
Hymenoptera, Diptcra. Plate IV. Fig. 2, 3, 5. 
2. Compact (Compactum). When head, trunk, and 
abdomen are not separated by a deep incisure, but 
inosculate in each other.— Ex. Buprestis, Elater, 
and many other Coleoptera, Orthoptera, and He- 
miptera. 
3. Bisect (Bisectum). When the head and trunk are 
not separated by a suture, so that the insect con- 
sists only of two pieces.— Ex. Araneidea. Plate V. 
Fig. 4. 
4. Coalite (Cocditum). When neither head, trunk, 
a As this work is intended for general readers as well as for the 
learned, the above rules, &c. it is hoped will not be deemed with- 
out use. 
h These symbols are inserted here, because they may be very con- 
veniently adopted in a correspondence on the subject of Entomology, 
