Abstract
Abstract Two new species of nemobiine crickets, Pteronemobius nigrovus and Pteronemobius bigelowi, are described. Both are widely distributed in grasslands throughout New Zealand and are sympatric in many areas. P. nigrovus eggs from Christchurch required 5–8 weeks at 5–9°C to complete diapause while P. bigelowi eggs from Kaikoura required 8–10 weeks at 5–9°C. Diapause in the eggs of both species occurs before a visible embryo is formed. Crosses between P. nigrovus from Christchurch and P. bigelowi from Kaikoura indicate that a high degree of reproductive isolation exists.
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