Memoirs on the Coleoptera/Volume 1/New Species of the Staphylinid Tribe Myrmedoniini/Tribe Myrmidoniini/Group Athetæ/Atheta/Liogluta
Liogluta Thoms.
As represented by the European longinscula Grav. and nitidula Kr., Liogluta is allied somewhat to Stethusa in the more widely separated middle coxæ, with the mesosternal process rather wide and abruptly arcuato-truncate at tip; it differs from Stethusa in its much smaller eyes, smaller prothorax and generally black coloration. The basal joint of the hind tarsi is equal to the second or a little longer; the infra-lateral carinæ of the head are feebly developed and abbreviated. The following American species agrees very well in structure with the European, except that the metasternal projection is longer and more angulate:
| Atheta (Liogluta) insolens n. sp.—Moderately stout and convex, strongly shining and with obsolescent micro-reticulation, deep black, the antennæ black throughout, the elytra and legs piceous, the former blackish basally; head parallel, well developed, the eyes at more than their own length from the base, the basal angles broadly rounded; antennæ moderate in length; rather rapidly incrassate, the outer joints distinctly wider than long; prothorax transverse, parallel, rounded at the sides, intermediate in width between the head and elytra, not distinctly punctulate and unimpressed; elytra large, slightly transverse, much wider and very much longer than the prothorax, very minutely, not closely punctulate; abdomen almost as wide as the elytra, parallel, with just visibly arcuate sides, almost sculptureless; first four joints of the hind tarsi equal. Length 2.5 mm.; width 0.7 mm. Queen Charlotte Islands (Massett),—Keen. |
Differs from vicina and nitidula in its broader abdomen, from the former also in its larger head and prothorax; the antennæ, also, are more rapidly and strongly incrassate than in either. In the male of insolens the abdomen is not quite so broad as in the female, and the sixth tergite is trapezoidal, transversely truncate at tip, the truncature feebly and vaguely crenulate, the surface at apex bounded at the side by a feebly oblique narrow straight and even carina, the general surface of the segment strongly micro-reticulate and with numerous large cariniform granules.