LARVAL TAXONOMY OF THE TROGINAE IN NORTH AJMERICA 23 



apotormae. Central, depressed area bordered laterally and posteriorly 

 by row of inwardly directed, closely set phobae. Distal phobae on right 

 side usually curving slightly mediad to connect with patch of phobae 

 near apex of right subapotorma. Hypopharynx also with prominent, 

 elevated, sclerotized process located above point where subtormae 

 adjoin. Maxilla (figs. 41 and 42) with galea and lacinia separate. 

 Lacinia with 3 prominent unci and about 10 to 22 marginal setae. 

 Two-segmented galea with whorl of 5 setae at base of terminal uncus. 

 Four-segmented maxillary palpus with 1 seta on basal segment and 

 2 setae on segment 3. Stipes and cardo each with 1 seta on exterior 

 surface. Maxillary stridulatory area with curved double row or curved 

 patch of small stridulatory teeth. 



Mandibles (figs. 40 and 43) darker than head capsule, with 2 

 widely spaced setae in dorsal exterior groove. Left mandible slightly 

 longer. With small, sharp tooth (S3) proximad of scissorial notch 

 of left mandible. With larger, rounded tooth (S2) proximad of scis- 

 sorial notch of right mandible. Both mandibles with single tooth 

 (S4 of left mandible and S3 of right mandible) on inner margin be- 

 tween scissorial and manducatorial areas. Tooth on left m.andible 

 usually larger. With small brustia near base of tooth on ventral surface 

 of each mandible. Molar area of left mandible hollowed to receive 

 right mandible. Each mandible with brustia on median border near 

 base. 



Prothorax (fig. 39) with prominent yellow brown to dark brown, 

 sclerotized shield on each side; shield bordered with setae. Setae 

 more numerous on anterior border and not continuous across dorsal 

 nonsclerotized area between shields. With 2 lateral lobes with about 

 1 to 10 setae each. Biforous spiracle located caudodorsad posterior 

 of 2 lateral lobes. Sternum with or without a few small setae. 



Mesothorax (fig. 39) divided dorsally into larger anterior lobe 

 (DLl) and smaller posterior lobe (DL2). DLl with transverse row of 

 about 14 to 40 setae. DL2 without setae. Lateral lobe with about 2 

 to 30 setae. Sternum usually with gi'oup of about 2 to 8 setae on each 

 of 2 lobes. 



Metathorax also divided dorsally into larger anterior lobe (DLl) 

 and smaller posterior lobe (DL2). DLl with transverse row of about 

 15 to 45 setae and 2 spinules. Spinules widely separated and anterior 

 to row of setae. DL2 often with 1 or 2 spinules. With 2 lateral lobes; 

 anterior lobe usually very small and with to about 4 setae, larger 

 posterior lobe with about 3 to 10 setae. Sternum with about 2 to 10 

 setae on each of 2 lobes. 



Infraepisternal area usually with 1 large seta on prothorax, with or 

 without large setae on mesothorax, usually without large setae on 

 metathorax. Infraepimeral area usually with 2 to 10 large setae, setae 

 usually increasing in number from prothorax to metathorax. 



