364 



Summary. 



The Terminology used in this treatise has been explained 

 on pp. 319, etc.; a short account also follows the explana- 

 tion of the figg. 1, 2. It is essentially based on the reraarkly 

 clear statements given (pp. 57 — 64) by Dr. Hopkins in his 

 eminent paper: Contributions toward a monograph of the 

 scolytid beetles. I. The genus Dendroctonus. (Ü. S. Dep. 

 of Agriculture. Bureau of Entomology. Technical series 

 Nr. 17. Part I — Washington 1909. 



After a comparative examination, Dr. Hopkins' names 

 and definitions have been made use of here with respect to 

 the homologous parts of the Carabid-larvæ. In stead of the 

 expression »entogular plate« I think it, however, more cor- 

 rect to employ the word: »tentorium«, and in stead of 

 »genal area«, the expression: »place of the ventral fixation 

 of tentorium«. On the head of the Carabid-larvæ there exist, 

 moreover, some characteristic areæ, not developed in the 

 Dendroctonus-larvæ; these, of course, have not been denomi- 

 nated by Dr. Hopkins. Being diversely developed in the 

 different genera, these areæ are, however, of a considerable 

 systematic interest, and as they are not sufficiently known 

 as yet, I have studied in detail their morphology, described 

 their location and shape, and, as a rule, also proposed new 

 names for them. 



Ad fig. 1, and fig. 2. 



The ventral posterior border of the epicranium fit ex- 

 actly into the anterior border of an unpaired sclerit, in the 



