. Coleoptera : general introduction and Cicindelidae and Paussidae. he cheek (gena) is at the side of the head and to its inner wallis attached the mandibular muscle. The walls of the head aresupported or braced within by the tentorium, which consists of acentral plate from which diverge two pairs of arms extending tothe skull: it braces the skull, affords muscular attachments andholds in place the cephalic ganglia and the oesophagus (Folsom): inColeoptera {Hydrous, etc.), it protects the nervous cord whichpasses under it. The tlioracc is made up of three parts, the prothorax, mesothorax,and m
. Coleoptera : general introduction and Cicindelidae and Paussidae. he cheek (gena) is at the side of the head and to its inner wallis attached the mandibular muscle. The walls of the head aresupported or braced within by the tentorium, which consists of acentral plate from which diverge two pairs of arms extending tothe skull: it braces the skull, affords muscular attachments andholds in place the cephalic ganglia and the oesophagus (Folsom): inColeoptera {Hydrous, etc.), it protects the nervous cord whichpasses under it. The tlioracc is made up of three parts, the prothorax, mesothorax,and metathorax ; these are often spoken of, for convenience sake,as the pronotum, mesonotum, and metanotum, but these terms shouldproperly be applied to the upper parts only, the lower portions EXIJ5BNAL STRUCTURE. 7 being rightly called respectively the prosternum, mesostenium, andmetasternum. The pro-thorax is quite free and never soldered tothe mesothorax: this is one of the leading characteristics of theorder. The pronotum is visible entirely from above, while the. Fig. 5.—Underside of Cicindela campestris, male, a, antenna ; Ihr., anteriormargin of labrum ; nid., mandible ; mx.} maxilla; , maxillary palpus ;m., m., mentum and tooth of mentum; , labial palpus; , gular sutures;st1, prosternum; 6/.,, mesosternum; st3, metasternum; epsx, eps2, epss,episterna of theprosternum, mesosternum, and metasternum ; rpmx, cpm.„epimera of the prosternum and mesosternum ; cpl., epipleura ; v1 to v7,ventral segments of abdomen ; j\ tedeagus. cv c2, c3, coxaj/;-,, tr2, , troebantersfi, fz, /3. femoratibv tib2, tibz, tibiaet,, f.„ /.,, tarsi of the front, middle, andhind legs. (After Ganglbauer.) metanotum is entirely covered by the elytra: a small portion of:the inesonotum is usually visible and this is known as thescutellum. The prosternum, mesosternum, and metasternum bearrespectively the anterior, intermediate, and posterior pairs of legs, 8 INTRODUCTION. while the raes
Size: 1330px × 1879px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectbeetles, bookyear1912
