. A manual of zoology. Zoology. 424 ARFHROrOPA ^vinJ;s. The anterior pair, separated at the base by a seulellum. are hard clw'yj not luted for lliuht, and from these eomes the name Coleoplera, sheath wings. Ihuier the elytra are proieeted llie deUeaie nuieh fohled liinder wings, the organs of ihght. Sinee the seeond and llrirdlhoraeic riniis and those of \hc abdomen are eovered by tlie elytra, these are so;t above. Kxternallv the relations of the elytra eause a regional division peeuliar to the lieetles ^lig. 471"): head, prothorax, aird a third di\isioa composed of nieso- and metathorax
. A manual of zoology. Zoology. 424 ARFHROrOPA ^vinJ;s. The anterior pair, separated at the base by a seulellum. are hard clw'yj not luted for lliuht, and from these eomes the name Coleoplera, sheath wings. Ihuier the elytra are proieeted llie deUeaie nuieh fohled liinder wings, the organs of ihght. Sinee the seeond and llrirdlhoraeic riniis and those of \hc abdomen are eovered by tlie elytra, these are so;t above. Kxternallv the relations of the elytra eause a regional division peeuliar to the lieetles ^lig. 471"): head, prothorax, aird a third di\isioa composed of nieso- and metathorax plus abdomen eovered by the el\-lra. The numerous speeies of beetles—over di-scribod—are dixided into normal forms and Rhynehophora, the normal I'.irms being siibdi\ided uiion charaeters derived from the tarsi as follows: Sub Order I. Tarsus live-jointed, the last club-shaped and bearim.; the claws; the other four are shma and somewhat heart-shaped (,hi;. 47^, d). This largest sub order coiuains the tiger beetles (, the predaccous ^: i^lig. 471); water lieeiles, and Dytiscid-E; or Sc.\:, represented by the 'June bugs,' ^^cIoloIllIla*; fire liies, L.^; rove beetles, Sr.\, etc. Sub Order II. HETEROMERA. First and second legs pentam- ennis, third apparendv four-jointed; few species; 'oil bottles' ^;) and the blister beetles, C.\xtei:\riP-E, both con- taining a jieculiar substance, cantharidin, which renders the 'S]>anish flies,' an important ingredient of blistering })lasters. TrXKlU^ Sub Order III. TETRA^^IERA (Cryptopentamera). Tarsi with the penult joint rudimentary, gi\"ing the impres- sion of four joints i,lig. 472, b). The families numerous in species, are injurious to vegetation. The larva' of bore in wood. The : (Colorado 4--.—jR,7- potato beetle, Poryphorj''') feed on lea\es. Sitb Oixler 1\'. !a)ii!iiis iiLiiirus
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1912
