| Prosopocera lactator | |
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| Prosopocera lactator dorsal and ventral views | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Coleoptera |
| Suborder: | Polyphaga |
| Infraorder: | Cucujiformia |
| Family: | Cerambycidae |
| Genus: | Prosopocera |
| Species: | P. lactator |
| Binomial name | |
| Prosopocera lactator (Fabricius, 1801) | |
| Synonyms | |
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Prosopocera lactator, the Turquoise Longhorn, is a species of flat-faced longhorn beetles in the subfamily Lamiinae.
Prosopocera lactator can reach a length of about 23–37 millimetres (0.91–1.46 in). The colors and markings of these longhorn beetles are quite variable. Usually they are brown-colored, with large light greenish or whitish patches on the elytra and pronotum and turquoise leg markings. The coloration of said greenish-white patches derives from the orientation of three-dimensional photonic-crystal grains present in the scales. These beetles feed exclusively on Cashew ( Anacardium occidentale ). Females lay their eggs in the stems and branches of the Buffalo Thorn ( Ziziphus mucronata ).
This species can be found in Democratic Republic of the Congo, Guinea, Malawi, Mozambique, Senegal, Somalia, South Africa, Tanzania and Uganda.