1883. ] On the Genealogy of the Insects. 941 
297-302, Pl. 1v), that we have a clew to the probable origin of 
the different types of Coleopterous larvae. The metamorphosis 
of the oil beetle (Meloé), originally discovered by Siebold and 
Newport and also Fabre, is described in different entomological 
manuals.’ In brief, the larvae of Meloé when hatched are very 
minute, active, six-legged, slender-bodied creatures, parasitic on 
wild bees ; as the legs end in three claws the insects in this stage 
are called “triungulins.” These larve attached to the bees are 
thus carried into the nests of the latter, where they feed on the 
bee-larvee and bee-bread. On becoming fully fed, instead of 
transforming directly into the pupa state, they assume a second 
larval form, entirely unlike the first, the body being cylindrical 
Fic. 4.—Hypermetamorphosis of Meloé. 4, triungulin ; B, 2d larva; C, 3d 
- larva; D, pupa; Æ, beetle. 
and motionless, with long legs; they then attain a third larval 
(coarctate) stage, the head small and the body thick, cylindrical 
and footless ; after this they assume a true pupa stage, and finally 
become beetles. 
Professor Riley has traced the hypermetamorphosis of the 
blister beetle (Epicauta), which passes through three larval stages 
Ore transforming to a pupa. He divides the life-history of this 
beetle into the following stages: (1) Triungulin ; (2) second 
larva (Caraboid); third and fourth Scarabeoid stage; fifth or 
Coarctate larva; sixth or Scolytoid larva; (7) true pupa; (8) 
beetle. (The reader should examine the figures in Pl. rv of the 
first report of the U, S. Entomological Commission, otherwise he 
‘See the writer’s “ Guide to the Study of Insects,” pp. 477-479, Figs. 447-451- 
