Indian forest insects of economic importance Coleoptera . vipositing in the trees. Thehisterid beetles were found in the egg-galleries of the bark-borers, and wereapparently engaged in laying their eggs in the tunnels. It is probable thatthe histerid grubs feed on the larvae of the Scolytus and the beetlesperhaps on the eggs. But little is at present known about the larval and pupal stages ofthe beetle. I think it possible that the number of generations in the yearcoincides with those of the Scolytus insects. The insect, owing to its abundance in the trees and to the fact thatit appears to be
Indian forest insects of economic importance Coleoptera . vipositing in the trees. Thehisterid beetles were found in the egg-galleries of the bark-borers, and wereapparently engaged in laying their eggs in the tunnels. It is probable thatthe histerid grubs feed on the larvae of the Scolytus and the beetlesperhaps on the eggs. But little is at present known about the larval and pupal stages ofthe beetle. I think it possible that the number of generations in the yearcoincides with those of the Scolytus insects. The insect, owing to its abundance in the trees and to the fact thatit appears to be predaceous upon several bark-boring beetle pests inthe Himalayan region, is evidently of considerable importance in theforest. Thanasimus himalayensis, Steb.—This clerid beetle has been alreadyfully icribed on p. 508. It is one of the most important of the Scolytuspredators, and is commonly to be found flying over or running about onfelled or fallen green deodar-trees which are infested by the two Scolytusbark-borers S. major and S. minor. Hate LK. fe. Slightly under Vnat. size. , Faoto. Fnotogravure. Sunreyof India EGG AND LATIVAL GALIERIES OF SCOLYTUS SCOLYTUS MINOR, STEB. IN : . FAMILY SCOLYTIDAE 577 Scolytus (Eccoptogaster) minor, Stebbing. REFERENCES.—Stebbing, Ind. For. .Mem. Zool. Ser. vol. i, pt. ii, p. 22; Depart. Notes, vol. i, p. 207. Habitat.—Deodar Forests of the North-West Himalaya. Tree Attacked.—Deodar (Cedrus deodara), North-West Himalaya. Beetle.— This insect greatly resembles the larger Scolytus, the eggs, larvae, and pupaepresenting no differences of importance. The beetle has the following differences in external characters :—Description. Smaller than major-, which it greatly resembles, the elytra usually darker in colour to nearly black. The front of head presents dif-ferences. In the female there is no median longitudinal line or striate area or mediandepression near basal margin on vertex
Size: 1090px × 2293px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectbeetles, bookyear1914
