Hebard—Dermaptera and Orthoptera of Hawai 339 
South side of Oahu, V, 15, 1919, (J. A. Kusche), 3%, 32, 
1 juy., |Hebard Coll:], 
Kawa Ul; 26 and 1V, 2 and 4) 1919, 3500 and 4000 feet, 
(ia. Kusche), 3.65 12, pilebard ‘Coll.] 
This species is a comparatively recent adventive in Hawaii, 
having first appeared there, according to Perkins,** about 1900. It 
was first recorded from the Islands in 1906, by [Kotinsky, as 
A. crenaticeps Blanchard,** identified as that species by Swezey and 
confirmed by Bruner. Swezey has later given interesting data as 
to the life history of the species.*® 
At the time those records were published, Bolivar’s “Notas 
sobre los Pirgomérphinos, X, Subfam. Atractomorphinae,’’** in 
which ambigua was described, had probably not been seen by either 
Swezey or Bruner. 
Comparison of the present material with a series of seven males 
and ten females from Shanghai, China, in the Hebard Collection, 
shows conclusively that but one species is represented, the Shang- 
hai topotypes agreeing closely with Bolivar’s description, except 
that the type is apparently a very large individual. F. W. Terry,*® 
in his “Notes on Some Insects Observed in South China which 
are also Common in Hawaii,” found the species of Atractomorpha, 
which was common about Hong Kong and Kowloon, the same as 
the Hawaiian insect, and recorded it as crenaticeps. Though 
closely related, ambigua may be distinguished from crenaticeps and 
similis (Bolivar) by the distinctly weaker pronotal carinae and 
the presence on the pronotal lateral lobes, mesad near the caudal 
margin, of a small area, which is smooth and colorless. 
The species is known only from the islands of Oahu and 
Kauai, having been first recorded from Kauai as crenaticeps by 
Swezey in 1918.* 
“Fauna Hawaiiensis, II, p. 687, (1910). 
* Proc. Hawaiian Ent. Soc., I, p. 38, (1906). 
“© Proc. Hawaiian Ent. Soc., I, p. 106, (1907). 
“ Bol. R. Soc. Espanola Hist. Nat., V, pp. 196-214, (1905). 
** Proc. Hawaiian Ent. Soc., II, p. 92, (1909). 
* Proc. Hawaiian Ent. Soc., III, p. 370. 
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