Forest entomology . on. With regard to the life-history of the in-sect, I have found it in all its various stagesthroughout the whole year, and am therefore persuaded that Eichhoffsremarks regarding the respective broods are right—viz. : I. Spring swarm in May or June; larvae in May, June, and July ;pupae and imagines in July and Summer swarm from July till October; larvae in July, Augusttill October, and over winter; pupae and imagines in Sep-tember or October till May. III. Autumn swarm from August till October, larvae over winter,imagines and swarms and broods in May and
Forest entomology . on. With regard to the life-history of the in-sect, I have found it in all its various stagesthroughout the whole year, and am therefore persuaded that Eichhoffsremarks regarding the respective broods are right—viz. : I. Spring swarm in May or June; larvae in May, June, and July ;pupae and imagines in July and Summer swarm from July till October; larvae in July, Augusttill October, and over winter; pupae and imagines in Sep-tember or October till May. III. Autumn swarm from August till October, larvae over winter,imagines and swarms and broods in May and beetle (fig. 121) is from 2 to 3 mm. long, pitchy black in colour,shiny, and covered with a very fine pubescence; antennae and legsferruginous ; thorax constricted in front and punctured behind, andit has a sort of pinched appearance. The elytra have distinctlypunctured rows. The male can be very easily distinguished by itshaving a projecting hook on each elytron. 1 Forstzoologie. 2 Die Europaischen Fig. 121.—Pityogenes biden-tatus. (From FishersForest Protection.) COLEOPTERA—SCOLYTIDtE. 125 As this beetle has proved a veritable pest on the Continent, andalso occasionally in this country, it would be well to guard against itsravages. Perhaps the best preventive would be to remove or burnall comparatively young fresh branches which would come in prox-imity with any fairly large coniferous trees planted out, either inparks or villas, for immediate effect. Genus Trypodendron. The beetles of this genus are entirely different in their workingsfrom the sections hitherto considered. The Trypodendron mother-beetle bores directly into the stem of the tree for about J to |- inchdeep, directly towards the centre or pith, but when this depth is
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