AMERICAN HEMIHTERA, 75 



acute. Acaidhosoma dentata of Europe is closely related to cruciata. 

 It has the same form of female genital pieces, but the apical aiigle 

 of the sixth abdominal segment is more acute, the sternal lamina is 

 less elevated, and the punctuation above is finer and closer, espe- 

 cially on the elytra and scutellum. Further observation and mate- 

 rial may show cooleyi to be a distinct species. 



AoantliO!>«oiiia atricornis n. sp. 



Size and form of cruciata nearly. Head pale, shorter and broader tlian in our 

 other species; the tylus hardly longer than the cheeks, which are a little thick- 

 ened on the edijes; disk with a few almost obsolete uneolored punctures. Eyes 

 black, ocelli red. Anteniife shining black becoming fuscous toward the apex, the 

 nodes touched with pale. Pronotum pale, the ))unctnres shallow and concolor- 

 ous. inconspicuous; humeral angles rather prominent, subacute, shining piceons 

 bla(^k, shading into sanguineous on the base of the elytra and along the latero- 

 posterior and hind margins of the pronotum. Scutelluni faintly reddish on the 

 base and tip, paler across the middle, the jiunctures scattering, dark brown or 

 black. Elytra pale, dull sanguineous along the inner and apical margins or 

 deepened to piceons on the shoulder and rounded apical angle, costa narrowly 

 pale at base. Membrane with a brown cloud at base and a well-defined fuscous 

 spot over the dark apical angles of the last abdominal segment. Beneath pale 

 becoming fulvous on the vetiter and deepening to sanguineous toward the tip 

 and to black on the acute apical angles of the sixth segment. Stigmata brown, 

 transverse. Sternal lamina much elevated between the anterior co.xse, as in cru- 

 ciata. Legs pale, the apex of the tibiae and tarsi dusky. Valve of the female 

 genital segment more triangular than in cruciata. the intermediate plates short 

 and obtuse, as in that species. Ajiex of the male genital segment feebly rounded, 

 the sinus almost obsolete, the apical bristles short, forming but a small brush 

 either side of the middle. Length 9 to 10 mm., width across the humeri 5 to 

 5i mm. 



Described from many examples taken in Montreal by Mr. Ger- 

 main Beaulieu, and two taken in Indiana by Prof. W. S. Biatchley. 

 There are also specimens in the Cornell University collection taken 

 in New York. So far as my observations extend this .seems to be 

 our most abundant northern species of Amnthosoma. I formerly 

 determined it as cruciata Say, but the lilack antenna) and humeral 

 angles, and uneolored punctures on the pronotum will at once dis- 

 tinguish it from tliat species as well as from the European dentata. 

 It is apparently the insect described by Provancher as cruciata Say 

 (Petite Faune Ent. du Canada, Heniip., p. 48), but from his notes 

 he had evidently seen the true cruciata without recognizing it as 

 distinct. 



TEANS. AM. ENT. SOC. XXX. M.\KCH. 1904 



