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distinctly striated, most often covered by the posterior edge 

 of the segment anterior to it. Only that of prothorax is 

 large and always visible; ^) the large middle area, scutum, 

 and ^) a posterior postscutum, narrow and striated. — In 

 sternum, too, the same tripartition is found, but often the 

 biconvex larvæ do not show it distinctly. Anteriorly on 

 the sternal side of prothorax a large triangular sclerit is 

 seen adjacent to the head: Chest-sclerit (præsternum 

 Berlese) — The sagittal median line is slightly deepened 

 and often a little paler. 



The muscular impressions on scutum of the ab- 

 dominal segments are typically angular, one side of the 

 angle, the transversal branch, going along the anterior edge 

 of scutum for a shorter or longer distance towards the sagittal 

 middle line. In several of the cylindrical larvæ (Melanotus, 

 Ectinus, Elater) the transversal branch is very broad and 

 cancellate, in other forms more or less indistinct. In the 

 biconvex larvæ the anterior edge lies a little higher, the 

 anterior narrow part of the segment thus lying on a level 

 a little more elevated than the rest of the tergum. A little 

 above the spiracle the transversal branch stops laterally; 

 from this point the other side of the angle, the lateral 

 branch, bends about in a right angle in the rear, stretching 

 shorter or longer near the lateral edge of tergum, being in 

 many cylindrical larvæ a distinct deepened line or furrow, 

 or the lower edge lying a little more elevated (in biconvex 

 larvæ). 



Setæ. On each side near the posterior edge of scu- 

 tum there is a transversal row of setæ often only consisting 

 of 2 — 3 long ones, many larvæ however having more, 

 6 — 7, setæ on each side. The other parts of the segments 

 are more or less furnished with setæ, also sternum. 



9*'' abdominal segment in the cylindrical larvæ is 

 cylindrical-conical i. e. conically pointed, and a little 

 basal part cylindrical; terminating either merely rounded or 

 in an impair terminal tooth. Only a single cylindrical 

 larva (Melanotus castanipes) has the D*"* abd. segm. flatten- 



