360 ERNEST WARREN. 



showing extruded vagina and two small, obliquely-placed processes, 

 probaljly to be regarded as homologues of the lateral lobes of the male. 



Fig. 16. — X 70. Left view of extremity of female abdomen, showing 

 position of supposed recognition-glands (/•. g.). 



Fig. 17. — X 70. Left view of extremity of the abdomen of female, 

 with extruded vagina and lateral lobes. 



Fig. 18. — X 70. Right view of the same. 



Fig. 19. — X 100. Transverse section through male beetle in the 

 plane of the metathorax and the sixth abdominal spiracle. Abdomen 

 largely filled by the hypertrophy of the testes {t.f.) and of the colon 

 {col.). Posterior narrow end of mesenteron pushed dorsal to (below) 

 colon, while in two females examined it remained entirely ventral 

 (above). Note the longitudinal abdominal ridges which rest on the 

 elytra of the thorax. 



PLATE XVII. 



Fig. 20. — X 60. Antenna of beetle with large, proximal, articulating 

 membrane and 11 joints. The terminal joint is provided with a median 

 ring of olfactory pits. 



Fig. 21. — X 140. Side vievr of mandible. 



Fig. 22. — X 140. Frontal view of maxilla 1. Note large palpiger 

 and the 2-jointed palp. On the second joint occurs a well-developed 

 large sense-pit, containing olfactory bristles. 



Fig. 23. — X 950. Vertical longitudinal section of olfactory pit of 

 maxillary palp. Note olfactory bristles (oh.), sensory and nerve-cells, 

 and certain vaguely-defined secretory cells. 



Fig. 23 a. — X 350. Tei-minal portion of antenna of supposed Para- 

 corotoca larva, showing a well-developed tactle bristle and on one 

 side a conical " olfactoi-y tooth." Note gland-cells {g. c.) mixed with 

 sensory cells (s.). 



Fig. 24. — x 140. Back (ventral) view of maxilla 2. The lateral 

 lobes have fused into a slightly bilobed plate liearing small 1-jointed 

 palps ; a well-defined mentum below. 



Fig. 24 a. — X 175. Mouth and portion of labrum in vertical longi- 

 tudinal section. Note labial nerve (I. n.). setose condition of inner 

 surface of bilobed plate, and a lateral setose ridge [g. r.) which is possibly 

 gustatory. The two lateral ridges perhaps represent portions of a 

 median epipharynx. 



Fig. 25. — X 45. Ventral view of pi-othoracic leg, showing articulation 

 and surrounding prothoracic sclerites. 



Fig. 26. — X 350. Side view of claws of prothoracic limb. 



