OHISMOLOttY. 339 



hand is dilated into a broad scutiform plate. Ex. 



Hydrophilus piceus $ . PLATE XV. FIG. 8. 

 3. STRIGILATE (Strigilata). When on the inner side 



of the first joint of the hand or palm the segment 



of a circle is taken out at the base opposite to the 



spur, the sinus being often pectinated with spines. 



Ex. Apis*. PLATE XXVII. FIG. 36. a. 

 4-. AURICULATE (Auriculata). When any of the joints 



are externally dilated into an auriform process. 



Ex. Gryllotalpa. PLATE XV. FIG. 6. *". 



ii. ALITRUNK (ALITIUJXCUS). 



1. BURIED (Sepultus). When its upper surface is wholly 



or nearly covered and hidden by the thorax, elytra 

 or other organs of flight b . Ex. Coleoptera, Or- 

 thoptera. 



2. REVEALED (Revelatus). When it is not so covered, 



but is equally conspicuous with the Prothorax, or 

 even more so. Ex. Neuroptera, Hymenoptera, 

 Diptera. Atractocerus in Coleoptera. 



3. COALITE (Coalitus). When it is not separable into 



two segments, the Medipectus and the Postpectus 

 forming one piece. Ex. Cimex L. 

 4-. BISECTED (Bisectus}. When it is separable into 

 two segments. Ex. Lamellicorn beetles. 



a. MESOTHORAX. 



a. COLLAR (Collarc}. 



1. UNCOVERED (Apertum). When it is not concealed 



* Monogr. Ap. Angl. i. 97. t. xii. Apis **. e. 1. Neut./. 21. d. 



b This term may be applied to the Mcsothorax in heteropterous 

 Hemiptera, in which that part lies buried under the Prothorax. 

 PLATE VIII. FIG. 20. i, A. 



z2 



