184 PROC. ENT. SOC. WASH., VOL. 23, NO. 8, NOVEMBER, 1921 



In his monograph, Dr. Hopkins does not discuss the homology 

 of the larval with the adult areas and explains his use of the 

 adjective form of adult sclerite names to designate larval areas 

 as follows: 



''Whether or not these divisions or lobes are homologous with 

 divisions occupying relatively the same positions in the pupa 

 and adult may be a subject for difference of opinion, but the 

 names here applied to what appear to be corresponding parts 

 should serve as a reliable guide to their recognition and accurate 

 definition and description in comparative studies and identifi- 

 cation of species." 



However, in the discussion of a paper by Dr. Boving, 1 Dr. 

 Hopkins 2 makes the following statement: "The essential 

 features in the development from the egg to the adult in the 

 insects with a so-called incomplete metamorphosis is not so very 

 different from those in insects with a so-called complete meta- 

 morphosis. Therefore much of the terminology, as applied to 

 the primary elements of the adult, is applicable to all stages, 

 such as the tergum with its prescutum, scutum, scutellum and 

 postscutellum; the sternum with its presternum, sternum, 

 sternellum and poststernellum; the pleurum with its epipleurum 

 and hypopleurum; the epipleurum with its epimeral area, lobe 

 or sclerite and its spiracular area, lobe or membrane; the hypo- 

 pleurum with its episternal area, lobe or sclerite and its coxal 

 area, lobe or coxa and so on as applied to all body segments of 

 all stages." 



The present observations and interpretations made, also, in 

 part, substantiate the conclusions of Berlese 3 in which he con- 

 siders the part here called the postscutellum as the " acrotergite " 

 or anterior portion of the segment posterior. Berlese found the 

 adult mesothorax and metathorax to consist of four parts 

 exclusive of the intersegmental skin; these he called "acroter- 

 gite," "protergite," "mesotergite," and "metatergite." In 

 the mesothorax: the acrotergite was the anterior phragma 

 ("Profragma (partim)"); the protergite, the prescutum ("Pre- 

 scuto (partim)"); the mesotergite, the scutum ("Meso- 

 scuto"); the metatergite, the scutellum ("Scutello"). In the 

 metathorax: the acrotergite was that part here called the post- 

 scutellum and the posterior phragma of the mesothorax as 



111 On the Abdominal Structure of Certain Beetle Larvae of the Campodeiform 

 Type. A study of the Relation between the Structure of the Integument and 

 the Muscles." Dr. A. G. Boving. Proc. Ent. Soc. Wash., Vol. XVI, No. 2, 

 June, 1914, pp. 55-61. 



2 Dr. A. D. Hopkins in discussion of above paper. Proc. Ent. Soc. Wash., 

 Vol. XVI, No. 2, June, 1914, pp. 61-63. 



3 1906-1909 Gli Insetti, loro organizzazioni, sviluppo, abidiedini e rapporti 

 coll' uomo. 



