Taxonomy of many species of Rhododendron from the Himalaya (four are seen flowering) is uncertain.

Elevational gradients are considered important for understanding causes behind gradients in species richness due to the large variation in climate and habitat within a small spatial extent. Geometric constraints are thought to interact with environmental variables and influence elevational patterns in species richness. However, the geographic setting of most mountain ranges, particularly continuity with low elevation areas may reduce the effect of geometric constraints at lower elevations. In the present study, we test the effects of climatic gradients and continuity with the low elevation plains of the eastern Himalayan mountain range on patterns of species richness. We studied species richness of ants (Hymenoptera: Formicidae) on an elevational gradient between 600m and 2400m in the Eastern Himalayapart of Himalaya biodiversity hotspot. Ants were sampled in nine elevational bands of 200m with four transects in each band using pitfall and Winkler traps. We used regression models to identify the most important environmental variables that predict species richness and used constrained null models to test the effects of contiguity between the mountain range and plains. We find a monotonic decline in species richness of ants with elevation. Temperature was a more important predictor of species richness than habitat complexity. Geometric constraints model weighted by temperature with a soft lower boundary and hard upper boundary best explained the species richness pattern. This suggests that a combination of climate and geometric constraints drive the elevational species richness patterns of ants.

Miracinae is one of the least studied braconid subfamilies with only two extant genera. Among them, Centistidea Rohwer is a speciose and widely distributed genus. East Palearctic and Oriental species of Centistidea are revised and eight new species are described, seven of which are from south India, C. crenulator sp. n., C. glabrator sp. n., C. lineator sp. n., C. mellapicalis sp. n., C. procarinator sp. n., C. rugator sp. n., C. scutellator sp. n.; and one from South Korea, C. albomarginata sp. n. A key to the extant species is provided. Distribution pattern of Centistidea and character plasticity within species are discussed.

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Cicindela (Calochroa) whithilli (Hope) and Cicindela (Calochroa) flavomaculata Hope (Cicindelidae: Coleoptera) are seasonally dominant predatory insects in the cultivated, and irrigated rice paddy fields of the South Indian peninsula. While studying the feeding ecology of these tiger beetles in rice paddy agro‐ecosystems in Sringeri area of the central Western Ghats, we examined their potential as biocontrols on the major rice paddy pest populations available in this region. Earthworms and tadpoles were significant prey organisms during the early cultivation period, while other traditional prey organisms like ants and spiders (mainly wolf and jumping spiders) were more common as prey organisms toward the mid‐season. The results showed that the feeding fauna of tiger beetles can extend to prey items beyond arthropods, to include vertebrates. Cicindela (Calochroa) duponti Dejean is another common species that occurs abundantly in the Areca orchards and on the bunds that separate rice paddy fields from adjacent uncultivated lands. We performed laboratory tests to determine the feeding guild of these beetles, and to investigate their possible role as a predator of the rice paddy pests. Although preliminary in nature, the results suggest that both C. whithilli and C. flavomaculata are ineffective as biocontrol agents of rice paddy agro‐ecosystems. They appear to have only a marginal impact on the larvae of Leptocorisa acuta, a major insect pest of paddy rice, but further experimental and observational studies are needed to firmly establish the significance of this observation.

We propose three most important measures for addressing the Linnaean shortfall in the Global South such as, a) completing the Grand Linnaean Enterprise; b) massification of taxonomy; and c) creating an enabling legal and regulatory milieu, which would be our best hold against the global biodiversity crisis.

Two new genera and one new species of the Braconinae tribe Adeshini are described and illustrated: Crenuladesha Ranjith & Quicke, gen. nov., type species Adesha narendrani Ranjith, 2017, comb. nov. from India, and Protadesha Quicke & Butcher, gen. nov., type species Protadesha intermedia Quicke & Butcher, sp. nov. from South Africa. The former lacks the mid-longitudinal propodeal carina characteristic of the tribe, and the latter displays less derived fore wing venation with two distinct abscissae of vein 2CU. A molecular phylogenetic analysis is included to confirm their correct placement. Since neither of the two new genera displays all of the characters given in the original diagnosis of the Adeshini a revised diagnosis is provided, as well as an illustrated key to the genera.

Trieces Townes, 1946 is one of the largest metopiine genera for which species have been described from all zoogeographical regions except the Indomalayan. The present study reports a major range extension of Trieces with the description of three new species from India. The described species are members of the onitis species group. An identification key to the Palearctic and Indomalayan species of the onitis group is included with the revised generic diagnosis and a key to separate Trieces from its closest genus Chorinaeus. Distribution pattern and character plasticity of Trieces are also discussed.