Bittacus stigmaterus  Say, 1823


Diagnosis:  This is a pale yellow-brown species with almost no shading along the wing crossveins.  The male epiandrial lobes are elongate and narrow with small, dark denticles along the ventral margin in the basal half.  The cerci are longer than the basistyles.


Distribution – Geographical:  This species is found over most of the eastern U.S., from Connecticut to northern Florida (Somma & Dunford, 2008) westward to Nebraska and Texas.  It seems to be more common in the western part of its range.


Distribution – Temporal:  Adults of this species emerge from June to September with the peak of emergence coming in August (Webb et al., 1975).


Ecology:  Adults of this species can be found in dry woodlands at the end of summer when the vegetation is starting to dry out.  It is usually found in areas of high humidity, such as along streams and river bottoms.


Biology:  Setty (1940) has described the immature stages and rate of development of this species.  Larvae develop during the late summer and fall, and overwinter as prepupae.


Notes:  This species is very similar to Bittacus texanus, but B. stigmaterus is somewhat smaller, less robust, and paler brown in color.  Both species have no darkening along the crossveins, but the coloration of B. texanus is more brown than yellow.  The male epiandrial lobes, although the same shape in both species, is more elongated in B. texanus.




Say, T. 1823. Descriptions of insects belonging to the order Neuroptera Linn. Latr., collected by the expedition authorized by J.C. Calhoun, etc. under the command of Major S.H. Long. Godman's WesternQuarterly Reporter of Medical, Surgical, and Natural Science, 2(2):160-165.


Setty, L.R. 1940. Biology and morphology of some North American Bittacidae (Order Mecoptera). American Midland Naturalist, 23:257-353.


Somma, L.A. and J.C. Dunford. 2008. Preliminary checklist of the Mecoptera of Florida: Earwigflies, hangingflies, and scorpionflies.  Insecta Mundi (0042): 1-9.


Webb, D.W., N.D. Penny, and J.C. Marlin. 1975. The Mecoptera, or Scorpion-flies, of Illinois. Illinois Natural History Survey Bulletin, 31:251-316.




A Bibliography of Mecoptera


A World Catalog of Mecoptera

The Mecoptera of Taiwan

The Mecoptera of North America


The Mecoptera of Chile


The Mecoptera of Mexico (in progress)


The Mecoptera of Gaoligongshan, Yunnan, China (in progress)


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