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Mouth parts. Labrum and clypeus are not present. 

 Mandibulæ have at their base a penicillus. They are rather 

 long and without retinaculum in the Agrypnini ; in the 

 other forms (Elaterini) shorter and with a retinaculum about 

 in the middle of the inner edge. Herbivorous larvæ often 

 have an extra tooth nearer the apex of mandibula, this 

 being more robust than in carnivorous or omnivorous larvæ. 

 In MaxiUce cardo is strongly chitinized and very large, 

 anteriorly a little broader than posteriorly, about 3—4 times 

 as long as broad, anteriorly near the outer edge with a 

 large setiferous fossa. With cardo the rather little, tri- 

 angular, strongly chitinized stipes articulates, in some forms 

 (f. inst. Campylus linearis) melted together with cardo. On 

 stipes fix a short, long-haired inner-lobe, a 2-jointed outer- 

 lobe and a 4-jointed palp by means of an often large con- 

 necting membrane. Labium. The large strongly chitinized 

 submentum is connected with the cardines of maxillæ, either 

 being longish triangular (Agrypnini) or having almost pa- 

 rallel sides, little broader anteriorly than at the broad 

 rounded posterior part. Submentum has 4 setæ, 1 in each 

 anterior corner and 2 posteriorly. In front of submentum 

 a mentum is situated, a soft quadrangular area anteriorly 

 passing into a pentagonal stipes bearing the 2-jointed palps 

 and having a few long setæ. Maxillæ and labium in com- 

 mon can be protruded and retired along the hypostoma that 

 is strongly arched in the rear, the connecting membrane be- 

 tween hypostoma and the posterior edge of the connected 

 maxillæ and labium being very large. The 2—4 little 

 roundish sclerits lying in the rear of cardines are but areae 

 strongly chitinized in this connecting membrane and have 

 no relation to the tentorium. This being very weak fix on 

 the under side on the posterior point of hypostoma just at 

 the beginning of the gular suture and in the rear of the 

 formerly quoted little sclerits; stretching as usually 

 through the head to the upper side of the head. 



In the segments of the body terga are divided 

 into *) an anterior narrow præscutum, often more or less 



