The Genitalia and Wing Venation of the Cucujidæ and Related Families*

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Abstract
The family Cucujidæ has attracted considerable interest because of the remarkable structural differences found in some of the genera. This diversity of structure indicates that the family is a very old one which has lost many of the intermediate forms. Sharp and Muir ('12) found that the male genitalia of the Cucujidæ are also very variable and for this reason they give the family a central position in the series Cucujoidea. A number of families are then derived from the Cucujidæ, including the Coccinellidæ and Endomychidæ. In some cases the connecting links between the families are rather obscure. A study of the morphology of the Coccinellidæ begun at North Carolina State College convinced me that a further study of the genitalia of the Cucujidæ and the related families would probably clarify the relationship of these families.

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