The latticed heath (Chiasmia clathrata) is a moth of the family Geometridae, belonging to the subfamily Ennominae, placed in the tribe Macariini. The genus was erected by Carl Linnaeus in his 1758 10th edition of Systema Naturae.
Taxonomy
The current placement of the latticed heath in the genus Chiasmia follows from the revision by Malcolm J. Scoble (2002) of the tribe Macariini, when he showed that true Semiothisa species were restricted to the Americas. There are a number of described subspecies. Molecular work has confirmed the placement of the species within Chiasmia.
Subspecies
Subspecies include: and east through Russia, Siberia, Amur River, northern Iran, Kazakhstan, China, Korea to Japan. It is a fairly common species in the British Isles. These moths inhabit a range of open areas, including grassland, moorland, and waste ground. In this rather variable species the background colour of the wings varies from yellowish to white, with a network of brown lines (hence its common name). These lines vary in thickness and sometimes the wings are almost entirely dark brown.
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File:Chiasmia clathrata - Géomètre à barreaux MHNT.jpg |Female – dorsal and ventral sides
File: Chiasma clathrata02.jpg|Spread wings
File: Semiothisa clathrata 02.jpg|Underside, at night
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[[Image:Buckler W The larvæ of the British butterflies and moths PlateCXXI.jpg|thumb|
140px|left|Fig. 6 larva after final moult]]
Larva
The final instar larva is pale green with white lines, including a strong lateral line and thin dorsal lines along the body. Abdominal segments A1 through A5 have a strong white line across the rear end of each segment that ends just above the lateral line.
Ecology
thumb|240px|right|Video clip of Chiasmia clathrata
In the British Isles there are one or two generations annually, with adults seen at any time from May to September. but they can also be observed at night where they are attracted to artificial light. Larvae feed on bedstraws (Galium mollugo, Galium verum) and various legumes such as clovers (Trifolium medium, Trifolium pratense), trefoils, lucerne (Medicago sativa)