Abstract
Speranza exonerata Ferguson, 2008 (Geometridae: Ennominae: Macariini) is a stenotopic moth only known from the northeastern USA. This species was reared from ova obtained from captive females in 2008 and 2009; the immature stages and life history are described. Both a larval host plant experiment and the discovery of wild larvae demonstrate that Speranza exonerata feeds on oak (Quercus L.), and does not feed on blueberry (Vaccinium L.). Larvae feed on scrub oak (Quercus ilicifolia Wangenh.), including both leaves and catkins, and Speranza exonerata may be a specialist on new growth of this plant. Ova are dormant through late summer, autumn, and winter, and hatch in early spring. Larval development is rapid (3–4 weeks), and corresponds to the availability of new growth of scrub oak. The pupal period is also brief (1–2 weeks), with adult moths flying in early summer.
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