Isodemis quadrata is a moth

Moth

A moth is an insect closely related to the butterfly, both being of the order Lepidoptera. Moths form the majority of this order; there are thought to be 150,000 to 250,000 different species of moth , with thousands of species yet to be described...

 of the Tortricidae

Tortricidae

Tortricidae is a family of moths, commonly known as tortrix moths, in the order Lepidoptera. Tortricidae is a large family with over 9,400 species described, and is the sole member of the superfamily Tortricoidea. Many of these are economically important pests. Olethreutidae is a junior synonym...

 family. It is known from China

China

Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...

 (Tibet).

The wingspan

Wingspan

The wingspan of an airplane or a bird, is the distance from one wingtip to the other wingtip. For example, the Boeing 777 has a wingspan of about ; and a Wandering Albatross caught in 1965 had a wingspan of , the official record for a living bird.The term wingspan, more technically extent, is...

is 19.5–20 mm for males and 21–22.5 mm for females.

Male

The head, antenna and labial palpus are yellowish brown, with scattered ochreous brown. The thorax and tegula are ochreous brown mixed with yellowish brown. The forewing is yellowish brown with sparse ochreous scales, but the costal fold is tinged with brownish black. The markings are brownish black mottled with ochreous. The hindwings are dark gray, distally with a pale grayish brown patch tinged with yellowish brown. The cilia are dark gray. The legs are dark yellow, tinged with brownish black on the ventral side of the foreleg and on the outer side of the mid- and hindlegs. The abdomen is grayish brown.

Female

The head and labial palpus are dark grayish brown. The antenna are brownish black tinged with yellowish brown. The forewings are broader than in the males. They are nearly rectangular and the apex is slightly protruding anteriorly. The costal margin is tinged with brownish black. The hindwings are gray, anterodistally with a yellowish brown patch mottled with brownish black.

Etymology

The specific name is from the Latin quadratus (meaning square), referring to the rectangular uncus in the male genitalia.

External links

• Review of the genus Isodemis Diakonoff (Lepidoptera, Tortricidae) from China, with description of three new species