The adults can often be seen in numbers flying just inches over turf.
The larvae may be considered pests because they destroy the roots of valuable plants.
Walter et al. (1938) report, "The larvae of the scarabaeid Cotinis longitarsis
) are often very abundant in the waste material in the lower levels of [Atta texana
] nests. From 30 to 40 C. longitarsis
grubs have been taken from a single chamber. They were of three sizes, possibly indicating a 3-year life cycle. This appears to be the only insect of economic importance found in the nests of Atta texana
. The adults feed readily on ripening fruit and are often quite injurious. Judging by the abundance of the larvae in the ant nests examined, it is possible that these nests constitute the principal breeding place of this scarabaeid. It therefore seems possible that the control of the leaf-cutting ant might also control the fruit pest C. longitarsis