358 ERNEST WARREN. 



p. Palp. jj. c. Pigment-cells, jj. ec. Proctodseal ectoderm. j9. /. 

 Posterior foramen, p. /*•. Postfurca. p. ml. Proximal portion of 

 Malpi.sliian tube. jj. s. c. Processes of sensory cells, p. sp. Protlioraeic 

 spiracle, p. st. Prosternal sternella. jjj. Prosternal epimeron. 2^h^- 

 Palpiger. ^3)'. Pronotum. jjr. ep. Prosternal episternite. pr. epi. Pro- 

 sternal epimeron. pr. g. Protlioraeic ganglion, jjr. p. Protlioraeic 

 dorsal plate, "pr. sh. Prothoracic shield. 2^''- s^^'- Pi'othoracic swelling 

 or exuding organ, pre. Procerebral lobe. pr.s^. Prosternum. pst. 

 Aero- and prosternite. 



r. Rectum, r.f.n. Root of frontal nerve. r.l.I. Right lateral lobe. 

 r. ce. g. Right oesophageal ganglion, r. p. Retinal pigment, r. p. c. 

 Retinal pigment cell. ret. t. Reticular tissue, rp. Receptacle. 



S. Sternite. 8. Sensory cell. s. c. Seminal chamber, s. cli. Seminal 

 chamber, s. fZ. Seminal dudt. s. cZ./. Semi-digested food. s. ejj. Secretory 

 epithelium, s. iu^. Submentum. s.^p/i. Suctorial pharynx, s. «». Striated 

 wall of spermatheca. sc. Scutellum. se. Semen in spermatheca. sec. 

 Secretion, sh. Sheath cavity of male sexual apparatus, sp. Spiracle. 

 spi. Spine, spt. Spermatheca. spz. Spermatozoon, stp. Stipes, suh. g. 

 Suboesophageal gauglion. 



T. Tergite. t. Testis follicle, t. h. Tactile bristle, t. m. Transverse 

 muscle, tr. Trachea, tr. c. Transverse commissure between cesophageal 

 ganglia, trh. Trabecula. tri. Tritocerebrum. tii. c. Trichogenic cell. 

 trie. Trichome. 



F. Vertex, v. c. Vacuolated cell. v. s. Vesicula seminalis. ro. Vagina. 

 vac. Vacuole. 



y. f. Young follicle, y. p. Yellow spot on abdomen. 



PLATE XVI. 



Fig. 1. — X 35. Side view of the beetle Paracorotoca akermani 

 (TFrtrre»), with the right side of the inverted abdomen slightly raised to 

 show the tergites between the longitudinal ridges. Note the exudatory 

 structures, pr.sw., mt. siv. and ab. sw., the supposed sexual recognition- 

 gland underneath sternite IX, and the spermatheca lying beneath the 

 cuticle in segment VIII. 



Fig. 2. — x 35. Ventral view of the male beetle. The sexual apparatus 

 is everted with the chitinous penis or middle lobe in the mid-line, while 

 the paramera or lateral lobes are obliquely dorso-ventral in position. 

 The ventral thoi-acic sclerites, the articulations of the walking legs and 

 the " abdominal stalk " are visible. 



Fig. 3. — x 35. Dorsal view of a female l:>eetle, with the abdomen 

 stretched backwards in line with the thorax. Note the two longitudinal. 



