[Illustration:
Fig. 1.
]
Head conically produced. Front in the female noticeably wider than the
eye, in the male about half as wide as in the female. Antennae
three-jointed, first and second joints about equal in length, third much
longer than the other two together and composed of six rings. Posterior
orbits wide in both sexes, but widest in the female, scutellum without
spines, four posterior veins arising from the discal cell, abdomen short
and broad, nearly circular in outline.
Named for Akron, Ohio, in which vicinity I have procured many rare
species.
AKRONIA FRONTOSA n. sp.
Length 4–4½ mm. Dull black, sparsely clothed with very short,
light-colored hair; eyes widely separated in both sexes, naked; antennae
entirely in front of the eyes; front produced more in the female than in
the male, posterior orbits present in both sexes, widest in the female;
thorax nearly equally four-sided, scutellum without spines, wings
hyaline, veins bounding costal, basal, marginal, and first and second
sub-marginal cells heavy and dark colored; discal cell rather small
emitting four posterior veins; legs black, knees and tarsi lighter
colored than the other parts; abdomen short and wide. Five males and
four females taken at Hawkins, near Akron, Ohio, May 21, 1899.
This is so distinct from species of _Nemotelus_ in general appearance,
and structure of the head, especially in the male, that it seems best to
make it the type of a new genus.
CHRYSOCHROMA NIGRICORNIS Loew.
This is a common species in southern Ohio. Specimens may be found
resting on the upper side of leaves and are easily approached. In the
female the white fronted line which Loew mentions is very conspicuous
and extends from one eye to the other above the antennae. In some
specimens the white lateral, thoracic lines are very easily seen, but in
others these lines are brownish. The male has much the appearance of the
female, the eyes are broadly contiguous, leaving a small vertical
triangle which is largely occupied by the ocelli; the lateral thoracic
lines in this sex are dark brown and therefore are not such a contrast
to the bright green thorax as in the female.
I had some trouble in locating the genus of this species by Dr.
Williston’s key. The species is not elongate, but of much the same form
as _Microcrysa polita_. A comparison was made with the type.