Chap. XI 1 1.] 



THE COCKROACH. 



259 



are bounded by the epicranial plates, which end below in 

 facets for the articulation of the mandibles. At the inferior 

 boundary of the foramen there is a large plate, the sub-mentum, 

 which forms part of the mouth organs. 



lac. 



D. 



FIG. SO. COCKROACH APPENDAGES. 



A. Ileiul of cockroach ; front view. B. Mouth organs removed. C. A leg. 

 D. Gtmapophyses of female. 



. and &. Lateral pieces, an. Antenna, an. f. Antennary fossa, an. gon. 

 Simple gonapophysis. ca. Cardo. d. Clypeus. cox. Coxa. e. Eye. ep. 

 Epi cranium, fe. Femur, g. a. Genital aperture, ga. Galea. I. Lacinia 

 oflabrum. 1. mn. Left mandible. I. p. Labial palp. lac. Lacinia of maxilla. 

 Ib. Labrum. m. Mentum. mx. Maxilla, mx. p. Maxillary palp. no. Notum. 

 p, gl. Paraglossa. pos. gon. Bifid gonapophysis. r. mn. Right mandible, 

 s. m. Sub-mentum. sp. Opening of spermatheca. st. (in B.) Stipes. st.(m C.) 

 Sternum, ta. Tarsus, ti. Tibia, tro. Trochanter. tin. Ungues. u\ s. "White 

 spot. viii. ix. Abdominal sterna. 



The mouth organs posterior to the mandibles are shown in 

 Fig. 80, B. The median part results from the fusion of a pair 



