Calosoma (Calosoma) himalayanum Gestro, 1875
Calosoma himalayanum Gestro, 1875: 851 (Typus: Ladak; Museo civico di Storia naturale di Genova)
Calosoma (Calosoma) sycophanta ssp. himalayanum, Breuning 1927: 171
Calosoma himalayanum, Andrewes 1929: 55
Calosoma (Callipara) sycophanta himalayana, Lapouge 1932: 403
Calosoma (Calosoma) himalayanum, Jeannel 1940: 85
Calosoma (Calosoma) sycophanta ssp himalayanum, Deuve 1997: 53
Length 28-32 mm. C. himalayanum is related to C. sycophanta, and its appearance is very similar so that Breuning (1927: 171) had considered it as a simple local population (Lokalrasse) of C. sycophanta. However, even apart from the different color, the two taxa, carefully observed, can be distinguished from each other with relative ease. In fact, although the pronotum of C. himalayanum is narrowed behind, it is less transverse than the one of C. sycophanta, and with a less elevated lateral margin.
As a matter of fact, C. himalayanum, resembles instead superficially to C. beesoni but is distinguishable by its relatively larger dimension and because of the head and pronotum that are not coarsely but finely and uniformely punctate, the elytra, convex, more parallel with less elevated sculpture, visibly serrate behind shoulders; the intervals not imbricate but only slightly incised, with the primary ones almost smooth with evident foveae.
In some collections, there are specimens of C. maximoviczi from southern Tibet (Linzhi and Changdu pref.) that are attributed to C. himalayanum. Despite a superficial similarity, due to the general shape of the body and the dark bluish colour, the two species are easily distinguishable. In fact, the pronotum of C. maximoviczi is less transverse, regularly rounded, not sinuate behind, quite different from that which characterizes the species of C. sycophanta group.
In conclusion, while cited from Tibet by Yu (1982) (see also Deuve 1997: 53), C. himalayanum most probably should be considered endemic to western Himalaya (Himachal Pradesh and Jammu and Kashmir).
India. Jammu and Kashmir: Ladakh (type, MGe), Kashmir 1500 m (EM), Srinagar 5200ft (SB), Khalatse 4500ft. (Andrewes, 1929: 56); Himachal Pradesh: Poo State (NMB, NMP, SB), Chamba (Andrewes, 1929: 56)
Notes: Diurnal, winged, this species has been noted as predaceous on Lymantria obfuscata, the defoliator of Salix alba (Andrewes, 1929: 56)
Kashmir: Himalaya, 1500m (coll. E. Migliaccio)
India: (Himachal Pradesh) State Poo, Bashahr
India: (Kashmir) Ladak, Himalaya, coll. Castelnau
(type, Museo civico di Storia naturale di Genova) (photo Poggi)