Calosoma (Castrida) peruviense Mandl, 1971

Length 24-28 mm. The pronotum of C. peruviense has sinuate sides, and its hind angles are rounded and obtuse, and they extend backward. The surface of the pronotum is deeply punctuated but not wrinkled. The elytral sculpture has barely recognizable punctures on the striae and markedly scaly intervals. The metatrochanter is rounded.
The upper body is a dark blue and the under body as well as the legs are black. The middle tibiae are arcuated, most conspicuously those of males in which also the hind ones are slightly so.
Mandl (1971: 40) in the original description compares it to C. granatense which has the same color, but from which it can be easily distinguished by many other characteristics including body shape, size, sculpture of the elytra and the presence of serration on margin of the elytra. It could be confused with some of the darker specimens of C. retusum, where the bluish reflections are more evident, but it is easy to avoid the confusion comparing the the shapes of pronotum and observing that C. retusum has the striae with deep dots, as well as the pronotum slightly wrinkled and with sparse and shallow punctures only.
There are several mentions of C. peruviensefrom central Peru: it was described from specimens collected in the department of Junin, and it was later collected in the neighboring departments of Ica and Lima. It is also possible that the older mention (Breuning, 1927: 202) regarding specimens of C. granatense from Callao, purportedly housed in the Museum für Naturkunde (Berlin's Natural History Museum), refers to C. peruviense. Furthermore, C. peruviense has been found in a small locality within the Amazonas department, indicating a northerly extension of its distribution.

Examined specimens
Peru. Junin: Satipo (type, NMB); Lima: Huarochiri (MHNG), Ica: Pisco (EM); Amazonas: Montenegro Aramango (SB)

Notes: Winged, attracted to light at night. The specimens examined were found between February and May, during and immediately after the rainy season.

Calosoma (Castrida) peruviense ♂ Mandl, 1971 Peru, Prov.Jauja, Satipo. 1938-39, H.Meskendahl (Holotypus, coll. Naturhistorischen Museum Basel)

Calosoma (Castrida) peruviense ♀ Mandl, 1971 Peru, Prov.Jauja, Satipo, 1938-39, coll.Meskendahl (Allotypus, coll. Naturhistorischen Museum Basel)

Calosoma (Castrida) peruviense ♂ Mandl, 1971 Perù, dept. Amazonas, Monteneyro (Montenegro) 600m, 2.2007

Calosoma (Castrida) peruviense ♂ Mandl, 1971 Peru. Pisco, 18.2.1986 M. De Benedetto leg. (coll E Migliaccio)