Catocala subnata
kah-TOCK-uh-lah mm sub-NAY-tuh
Grote, 1864

THE YOUTHFUL UNDERWING, courtesy of James K. Adams.

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TAXONOMY: Superfamily: Noctuoidea Family: Noctuidae Group: Noctuinina Subfamily: Catocalinae Genus: Catocala, Schrank, 1802

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DISTRIBUTION:

The Catocala subnata moth (wingspan: 75-90mm) flies from Manitoba, Ontario and Quebec to Nova Scotia, Canada, and south through Maine and Connecticut to North Carolina and west to Kentucky and Texas, then north to Iowa and Wisconsin.

The forewings are greyish white with blue-grey and light brown scales. Catocala subnata usually have hindwings that are a brighter yellow than those of neogama. Neogama usually have a basal dash absent in male subnata, but present in females.

Magnification of hind tibia helps to distinguish the two species:

subnata: cylindrical hind tibia
neogama: compressed or flattened hind tibia

subnata: ventral surface of tibia densely covered with evenly distributed spines.
neogama: ventral surface of tibia sparsely covered with sporadic spines.

Catocala subnata female, courtesy of Pierre Legault.

My first impression of the above specimen was that of C. neogama, probably due to the heavier markings and basal dash, but C. subnata females have the basal dash and generally are more strongly marked than males. Also note the uniformly pale, elongated and open subreniform spot which is characteristic of subnata.

The abdomen is bright ochre yellow, in strong contrast to the grey thorax. Pierre Legault assures me the above specimen in C. subnata based on examination of tibia.

Catocala subnata, male and female left, courtesy of Pierre Legault;
Catocala neogama, females right, Montreal, Quebec, August 2002

Note the general overall darker appearance of C. neogama as well as the slightly smaller size and the termination of the hindwing median band.

Visit C. neogama / C. subnata / C. piatrix comparison.

FLIGHT TIMES AND PREFERRED FOOD PLANTS:

Catocala subnata flies as a single generation with moths on the wing from July to September.

Moths come in to lights readily and also to bait.

The Catocala subnata caterpillar show a preference for black walnut, butternut and hickory.

ECLOSION:

Adults eclose from pupae formed under leaf litter.

SCENTING AND MATING:

Catocala subnata females emit an airbourne pheromone and males use their antennae to track the scent plume.

EGGS, CATERPILLARS, COCOONS, AND PUPAE: Eggs are deposited on bush bark in the fall and hatch the following spring. Mature larvae Image courtesy of

Larval Food Plants

Listed below are primary food plant(s) and alternate food plants. It is hoped that this alphabetical listing followed by the common name of the foodplant will prove useful. The list is not exhaustive, although some species seem very host specific. Experimenting with closely related foodplants is worthwhile.

Carya cordiformis..... Juglans cinerea Juglans nigra

Bitternut hickory Butternut Black walnut

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