No. 2323. LARVAE OF THE CLERIDAE—BOVING AND CHAMPLAIN. 585 



and parallel sutures extend from this latter suture; the one, from 

 near the middle, points forwards and outwards, the other, from the 

 end, points backwards and inwards ; the first forms the inner bound- 

 ary line of parasternum (pas) , the second the inner boundary line of 

 laterosternellum {Istl). 



Areas. — The Tergal region is limited by a transversal, straight 

 front margin between the two corresponding dorsal notches in front 

 of a segment, by U-shaped side margins between two successive dorsal 

 notches and by a transversal straight hindmargin between the two 

 corresponding dorsal notches behind the segment. The Prescutum 

 ipse) is transverse and band-like, mainly developed as intersegmental 

 membrane {T 8) -.in most genera narrow and rather indistinctly de- 

 fined posteriorly, in genera with long abdomen broad and distinctly 

 defined posteriorly. The Scutum (sc) and Scutellum {scl) have 

 distinct mediotergal subdivisions, which form together a conspicu- 

 ous Mediotergite. In a few forms, as Enoclerus spliegeus, a row of 

 small, pearl-shaped projections are present on each side of the scuto- 

 scutellar suture, and also along the two oblique branches from this 

 suture. In several forms as Galeruclerus^ Chariessa^ Phyllohaenus^ 

 and Priocera a pair of Ampullae {Amp) develops from the medio- 

 tergite of the second to the seventh or eighth abdominal segments. 

 The lateral subdivisions of scutum and scutellum are more or less 

 fused into a combined area, named Parascutum {pa). The Alar Area 

 (or Spiracular Area) {aa) is large, with a spiracle present anteriorly 

 and near the dorso-lateral suture. The Postscutellum {pos) is of 

 medium size in most forms; large in elongate forms. The Pre- 

 epipleural Area {pe) is completely or nearly completely developed 

 as intersegmental membrane; in most genera it is elongate, tri- 

 angular, tapering toward the dorsal notch; in genera as Mono- 

 phylla and Tarsostenus^ where the dorsal notch is linear, it is sub- 

 rectangular, ventrally with a short wedge-shaped cut into the basal 

 margin. The Median Epipleural Area, between the horizontal sec- 

 tion of the dorso-lateral suture and the ventro-lateral suture, is in 

 most genera provided with a large Epipleural Lobe {el). The Post- 

 epipleural Area {poe) is triangular and posteriorly adjacent to the 

 pre-epipleural area of the next segment. No pleural disks are f ound.^ 

 The Hypopleurum {hp) is dorsally well defined by that part of the 

 ventro-lateral suture, which is behind the pleural notch; ventrally 

 not equally distinctly separated from the adjacent areas; it is fleshy 

 and well developed in most forms. The abdominal Presternum {pst) 

 is, like in thorax, located below that part of the ventro-lateral suture, 



»The anatomy of these structures has Ijeen described first (1869) by Schiodte as 

 " foveae auditoriae" (Nath. Tidsskr., ser. 3, vol. 6, pp. 356, 366, etc.), later (1917) by 

 W. N. Hess, (The Chordotonal Organs and Pleural Discs of Cerambycid Larvae; Ann. 

 Ent. See. Amer., vol. 10, No. 1, pp. 63-74, pis. 4-7) and by him also associated with 

 chordotonal organs. 



