IJHLER ON INSECTS. 425 



basal. Hemelytra flat, scarcely wider posteriorly, the costal margin 

 cariuately raised, a little arcnated ; canens loug-triaugular, very sleuder 

 at tip ; membraue long. Abdomen narrow. 

 P. anfhocoroides, new sp. 



Piceons-black elongate-elliptical. Head smooth, dull, impnnctate ; 

 the eyes da' k brown, m,argined at base with paler ; the facets very large f 

 cheeks and tip of tylns rnst-red ; antennae yellow, more or less infuscated, 

 the basal joint black or piceous, with a pale tip, the two apical joints 

 dnsky. Rostrnra pale yellowish, more or less piceous at tip. Pronotum 

 dnll black, sparsely pubescent, a little polished on the elevated disk of 

 the anterior lol)e ; the lateral margins very oblique, and with the mar- 

 ginal line wavy ; the posterior side almost twice as wide as the anterior 

 one : the posterior lobe a little scabrous, obliquely depressed, the hume- 

 ral angles distinctly produced, somewhat ligulate, and rounded at tip ; 

 the deflexed sides wrinkled. Coxfe pale yellow; the femora piceous or 

 rufous, with the apex yellow ; tibife and tarsi pale yellow, sometimes a 

 little infuscated. Scutellum piceous or rufo-piceous, with a bright orange 

 spot each side of the disk, and the acute tip pale yellow. Hemelytra 

 yellowish-white, minutely scabrous, and sparingly, finely pubescent, 

 infuscated at base, and with a large fuscous cloud extending from the 

 middle to the tip ; cuneus fuscous, with a roundish yellow spot at base ; 

 membrane smoke-brown or pale brown. Postpectus and venter dull 

 rufous, the latter piceous on the middle ; the genital pieces more or less 

 orange. The hemelytra are sometimes fuscous, with a pale disk to the 

 clavus, and a large pale spot on the middle of the corium. 



Length to tip of membrane 3-3^ millimeters. Width of base of pro- 

 notum 1 millimeter or a little less. 



A fragment of a specimen was in the little lot kindly given to me by 

 Mr. B. H. Smith, collected in the vicinity of Denver, Colo. From 

 Grimsby, Canada, a specimen was sent to me by Mr. J. Petit, and I 

 have a specimen, collected by myself, from a strip of woods near Balti- 

 more, on July 8. Another specimen (c?) is in the collectonof the late 

 Dr. T. W. Harris, which was collected by him in Eastern Massachusetts 

 on the 20th July, 1831. This is the most interesting Heteropter which 

 lias yet been found in iTorth America. While being an undoubted 

 Phytocorid in its details of higher group value, it yet presents the fea- 

 tures and some of the characters of both the Lygwidcv and Antliocoridce. 

 As far as I have yet been able to examine the structure of the Phyto- 

 cordue in their various stages of development, they have strongly im- 

 pressed me as the great central group of the order, in which the charac- 

 teristics of all the other groups may be found, with some other features 

 which they hold entirely peculiar to themselves. 



Idolocoris Doug, and Scott. 

 I. agilifi, new sp. 



Form of J. palUdufi Fieber ; black, highly polished, impunctate, but 

 very minutely rugulose on the upper surface. Head normal, deep black, 



