BULLETIN 



OF THE 



BROOKLYN ENTOMOLOGICAL SOCIETY 



Vol. XVI February, 1921 No. i 



THE COMPARATIVE MORPHOLOGY OF THE MALE GENI- 

 TALIA OF THE LEPIDOPTEROUS FAMILY 

 HEPIALID^. 



By John R. Eyer, State College, Pa. 



Introduction. 



The male genitalia of Lepidoptera have long been a subject of 

 study by both the insect morphologist and the systematic ento- 

 mologist. As a result of this study two complete systems^ of 

 nomenclature have arisen for the sclerites and appendages com- 

 prising this organ. 



The morphologist, interested primarily in homologies, has 

 formulated a system based on the somatic structure of insects 

 and equally applicable to all orders of the Hexapoda. The most 

 prominent investigators of this problem from a morphological 

 standpoint are Burmeister, Kolbe, Peytoureau and Berlese. A. 

 G. Newell, Annals of the Entomological Society of America, June, 

 1918, has carefully homologized the morphological systems of 

 terminology throughout all the main orders of insects. , 



The taxonomist, interested particularly in the discovery of 

 specialized structures to serve as criteria for the differentiation of 

 genera and species, has originated a descriptive terminology based 

 on the structure and position of the particular part designated, 

 applicable only to Lepidoptera and often restricted to that family 



^ A third system of nomenclature used 'by European writers with refer- 

 ence tO' the Apterygotoid, Neuropteroid and Orthopteroid forms has been 

 homologized by G. C. Crampton, Bulletin Brooklyn Entomological 

 Society, 1918, and is not discussed in this paper. 



1 



