130 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



In the following papers on these larvae the terminology given 

 here will be adopted. From an anatomical study of the ceram- 

 bycids alone, it was found inadvisable to draw conclusions, 

 consequently the larvae of some eight or ten other Coleopterous 

 families have been studied more or less thoroughly. The general 

 areas as defined here have been found to conform very well, but 

 as to the terminology of some parts and the importance or sig- 

 nificance given to certain areas, this paper is provisional and will 

 be followed by another discussing a series of larval types. 



Before the 274th meeting of this society Dr. Adam Boving 

 presented a paper on the abdominal structure of certain Coleopter- 

 ous larvae as based on the muscular anatomy. 1 This he stated 

 was a continuation of Dr. Hopkins' study of the structure of the 

 scolytid larvae. 



The writer fully adopted this nomenclature in a paper on the 

 larvae of the Prioninae 2 and found it adaptable to the abdominal 

 structure which only was there discussed. But this paper in 

 which a further study and correlation of both the abdominal 

 and the thoracic structures of the cerambycid larvae is carried 

 out, certain modifications of Dr. Boving's terminology are sug- 

 gested as more generally applicable. 



Dr. Boving further mentions that he believes the characters 

 which he describes can also be used for larvae of other family or 

 ordinal rank. I can, in this connection, state that this has 

 been found the case in several Coleopterous families (beside those 

 here discussed) in which the anatomy has been studied. Especi- 

 ally applicable is his description of the intersegment al skin, the 

 muscles from its cunea as well , as the mechanical principles 

 involved, in the whole arrangement of folds, areas and muscles 

 pertaining to what he calls the lateral zone. 



A study of the principle of the primary segmental divisions, as 

 represented by Dr. Hopkins 3 in his study of the scolytid beetle, 

 Dendroctonus, and the above discussed principle of Dr. Boving 

 it is evident that these principles are identical, but that different 

 terms have been used to designate the homologous areas. Thus 

 Dr. Hopkins has shown that the pleurum is the main lateral 

 region, divided into two pleurites, the epimeron and episternum 

 of the adult, w r hich he says are undoubtedly homologous to the 

 epipleurum and hypopleurum of the larvae, and that between 



1 Boving, A. G., On the Abdominal Structure of Certain Beetle Larvae 

 of the Campodeiform Type. Proc. Entom. Soc. Wash., Vol. XVI, No. 2. 

 June, 1914, p. 55-60. 



2 Craighead, F. C., Larvae of the Prioninae, Rept. No. 107, U. S. Dept. 

 Agr., June 25, 1915. 



3 Hopkins, A. D., Contribution Toward a Monograph of the Scolytid 

 Beetles. Technical Series, No. 17, Part 1., U. S. Dept. Agr., 1911. 



