The Coleoptera of the British islandsA descriptive account of the families, genera, and species indigenous to Great Britain and Ireland, with notes as to localities, habitats, etc . of the ligula, and occasionally are not visible at all; from supports situated at the base of the ligula, between the ligula and mentum, arise the lahial paljn : these are usually 3-jointed, rarely 2-jointed, and occasionall), as in Mi/Ihvna, &c., setiform, not presenting the appearance of palpi at all. The mentum and ligula make up the labium : the terms ligula and labium, however, are used very loosely by many au
The Coleoptera of the British islandsA descriptive account of the families, genera, and species indigenous to Great Britain and Ireland, with notes as to localities, habitats, etc . of the ligula, and occasionally are not visible at all; from supports situated at the base of the ligula, between the ligula and mentum, arise the lahial paljn : these are usually 3-jointed, rarely 2-jointed, and occasionall), as in Mi/Ihvna, &c., setiform, not presenting the appearance of palpi at all. The mentum and ligula make up the labium : the terms ligula and labium, however, are used very loosely by many authors, who consider them as distinct from the mentum altogether, and speak of the labium as the basal portion of the organ in front of the ^f *>? *? ^f 1^; , , .,^,,,., ,. , . raglossse. d d. Labial palpi, mentum, the ligula proper being made up of the front portion, which in some cases, Alitalia, is much extended, and appears to be distinct, but is not really so. The comparative size of the joints of the labial palpi, and the number of setae borne by them and by the anterior margin of the ligula are very useful as affording generic characters in some Labium of Fierostichus c. Pa- The Thor.\x. Throughout this work the term thorax is used roughly for con-venience sake for the upper portion of the body between the head andthe base of the elytra, the part in fact whichin common language is usually called thethorax ; as a matter of fact, however, thethorax is made up of three parts, the inotlwrai;mesothorax, and metatliorax; the upper sur-faces of these are called respectively the pro-notum, mesonoium, and metanoticm, and theunder surfaces the pfosternum, viesosternum,and metasternum : the so-called thorax isreally the pronotum; the only portion of themesonotum visible from above is the scutellum,which usually appears as a triangular or semi-circular plate between the two elytra at base
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Keywords: ., bookcentury1800, bookdecade1, booksubjectentomology, bookyear1887
