FOLSOM: MOUTH-PARTS OF ORCHKSKLLA. CINCTA. 



EXPLANATION OF PLATES. 



[All figures are of Orchesella cincta L.] 



ABBREVIATIONS. 



Note. Each muscle is numbered in agreement with the text. 



a. Anterior. 



abd. Abductor. 



add. Adductor. 



at. Antenna. 



ate. Articulation. 



bac. Rod. 



br. Arm. 



br. a. Anterior arm. 



calc. Shoe. 



car. Cardo. 



cav. buc. Buccal cavity. 



cdx. Pivot. 



cht. Chitinous. 



cl. gn. Ganglion cell. 



clyp. Clypeus. 



cpt. Head. 



era. Cranium. 



ers. ba. Basal ridge. 



e'stt. Constrictor. 



eta. Cuticula. 



ex. Heel. 



d. Dorsal. 



de. Teeth. 



dep. Depressor. 



dil. Dilator. 



dt. Duct. 



e'phy. Epipharynx. 



e'th. Epithelium. 



exp. Expansion. 



/. Frontal. 



fac. Surface. 



ga. Galea ? 



gl. Gland. 



gls. Glossa. 



gn. inf'oe. Infra-oesophageal gan- 

 glion. 



gn. su'ce. Supra-oesophageal gan- 

 glion. 



gu. Gula. 



h'drm. Hypodermis. 



I. Intima. 



Veis. Incisive. 



l. Lateral. 



la. Plate. 



lab. Labium. 



