438 SYNOPTIC COLLECTION. 



pair of spiracles. 1 The May beetle like all beetles is 

 without a stinging organ. 



Some of the beetles allied to the Scarabaeidae have 

 greatly developed mandibles like those of Cladognathus 

 (No. 1094). 



Among the large beetles of the United States is Dynas- 

 tes (No. 1095, larva; No. 1096, D. tityrus Linn.). The 

 thoracic and abdominal regions of the larva are immense 

 as compared with the head. The legs are small since this 

 stage of the insect's life is passed in rotten wood. 



Coscinoptera dominicana Fabr. is an interesting form. 

 It fastens its eggs on long, slender stalks (PI. 1097, fig. 

 i ; fig. 2, egg, magnified) and its larva (fig. 3) makes a 

 case for itself out of the egg shell and particles of earth 

 (fig. 4) which it carries about. Fig. 5 is the beetle 

 enlarged. 



The potato beetle, Doryphora decemlineata Say, of the 

 family Chrysomelidae, is another good type of the Cole- 

 optera, but it is much smaller than Lachnosterna. The 

 larvae (No. 1098) are short, plump grubs that are ex- 

 tremely active. They burrow into the ground where the 

 pupae transform to the adult (No. 1099, alcoholic speci- 

 men ; No. 1 100, dried). 



The larvae of some of the Chrysomelidae when young 

 combine characters of the Thysanuriform type with those 

 of Coleopterous grubs, while the full-grown larvae would 

 be called caterpillars by those not knowing that this term 

 is restricted to young Lepidoptera. The three pairs of 

 legs in the young larva are prominent on each side (PI. 

 1 1 01, fig. 2, elm-leaf beetle, Galerucella lute o la Mull. ; 

 fig. i, eggs of same), while the body is rounded and grub- 

 like. The feet in the full-grown larva (fig. 3), however, 

 are not seen from above but only in a side view and the 

 general aspect is decidedly that of a caterpillar. 



When full grown, the larva finds a sheltered place in 



'Willcox, The Observer, July, 1896. 



