EXPLANATIONS OP TERMS USED IN TEXT.

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R.

radial rein, (Fig. page 155).

tectum, posterior part of alimentary canal (Fig. 40).

reticulate, with net-like veins or markings.

retrorse, pointing backward.

roseate, rosaceous, rose-red; a pale blood-red.

rudimentary, not sufficiently developed to be of use.

rufous, rufescent, reddish.

rugose, rugosity, rugs, wrinkled; wrinkles.

S.

salivary, relating to saliva; secreting or conveying saliva.saltatorial, fitted for leaping.

scabrous, covered with small, slight elevations; rough like a file.

scraper, a part of the stridulating organ (Figs. 46, 48).

scrobes, pits or depressions in which are placed the bases of the antenna;.

scutel.um, the third division of a thoracic tergite (Figs. 28, 32).

scutum, the second division of a thoracic tergite (Figs. 28, 32).

sebiSc, fat-secreting.

segment, ring-like division or joint.

semi,- a prefix meaning half.

serrate, saw-toothed.

serrations, teeth like a saw.

serrulate, finely serrate; having minute serrations.setaceous, bristle-shaped.shrilling organs, (Fig. 48).

sinuate, indented; cut into a series of deep sinuses with a wavy border.sinus, a curvilinear indentation, more or less profound;. an excavation asif scooped out.solitary, single.spatulate, paddle-shaped.

speculum, a # mirror-like, transparent, shining surface on the tegmina ofmale grasshoppers and crickets used as a sounding board (Fig. 45).spermatheca, a receptacle for semen; the seminal receptacle in the femaleinsect.

spinose, armed with spines.

spinulose, furnished with spinules or diminutive spines.spiracle, an external opening of the respiratory system.spurs, the strong spine at the apex of the tibiae.squamselbrm, shaped like a scale.sternal plate, the ventral plate of a body segment.sternum, the ventral part of a body segment.stipes, the second joint of the maxilla (Fig. 27).

stridulate, to make a shrill sound; to grate, scrape or creak with the strid-ulating organs.

style, a small non-articulated process near base of abdomen.