AMERICAN HE^IIPTERA, 73 



the ventral spine is longer, the apical angles of the sixth ventral 

 segment are more strongly produced and the colors are paler than 

 in phymatop flora. 



Euthyrhynchiis nori(lanii!>« Linn. 



Amyot and Serville report this species from Philadelphia, Stal 

 from New Orleans, and Prof Ball has sent me an individual taken 

 at Dayton, Tennesee. It is more abundant toward the south, and 

 in Costa Rica and other tropical countries takes on its most brilliant 

 coloring of metallic green or blue and orange. 



Subfamily Acanthosomid.e. 

 This subfamily is well distinguished from our other Pentatomids 

 by the biarticulate tarsi and the sharply keeled sternum. But one 

 genus has as yet been reported from our territory. 



Genus ACJAXTBIOSOM A Curtis. 

 Greenish testaceous; elytra with a transverse hand near the niiridle and the 



apical margin clouded with hrown. Size small lateralis. 



Pale or yellowish testaceous; inner and apical margins of the elytra sanguin- 

 eous or hrown 2. 



2. Antennse pale, apical joint dusky; pronotum with large, scattering, fuscous 



punctures criiciata. 



Antennfe piceous or black ; punctures on the pronotum concolorous nearly to 

 the hind margin atrieornis. 



Acanlhosoina lateralis Say. 



Edessa nebidosn Kirhy. Fauna Kor. Am., Insects, p. 277, 1837. 

 Acaitthosomn affinis Westw. Hope Catal., i, p 30, 1837. 

 Acanthosoma picicolor Westw. Hope Catal., i, p. 30, 1837. 



For the Westwood synonomy given here T am indebted to Dist- 

 aut's Studies on the Hope Collection. This is a widely distributed 

 species in the northern United States and Canada, and Distant even 

 reports a specimen from Mexico, the only references he gives for 

 Mexico, however, are referable to one example in the collection of 

 Dr. Signoret, and it is more than likely that there may have been 

 an error in the locality from which it came. My material is from 

 Montreal, New York and Vancouver Island, the latter kindly sent 

 to me by Rev. G. W. Taylor. 



Acantliosoina crticiata Say. (Aranlhosoma horealis Westw. Distant. 

 Proc. Zool. Soc, 1890, p. 818.; 



This species is of a pale testaceous yellow, with the apex of the 



TRANS. AM. ENT. SOC. (10) XXX. MARCH. 1904 



