200 THE CANADIAN ENTOMOLOGIST. 



abdomen more undulate, and with the genital and female ventral segments 

 differently shaped. 



5. Aradus Falleni^ Stal. — Taken by Mr. Heidemann near Washing- 

 ton, I). C, the most northern locality recorded for this species. 



6. Aradus gracilicornis, Stal. — Mr. Heidemann has sent me s|>eci- 

 mens from Chiricahui Mountains, Arizona. It was hitherto known only 

 from Cuba. 



7. Aradus ?iiger, Stal. — This species, although rare, seems to be 

 widely distributed. It is recorded from Colorado by Gillette and Baker 

 under the unpublished name, A. obliquus, Uhl. 



8. Aradus Heidemaufii, n. sp. — Elongate-ovate ( 9 ), fuscous, uni- 



colorous, external margins of pronotum, abdomen and basal part of corium 



very finely crenulate. Head distinctly longer than broad, scarcely shorter 



than the pronotum in the middle, with a U-shaped impression above and 



a small, rather acute forwardly-directed tubercle a little within and in front 



of the eyes, apical process narrowly conical, just a little passing the base 



of the second antennal joint, antenniferous spines a little divergent, with a 



distinct tooth on the outer margin, antennae cylindrical, second joint 



shorter than the width between the eyes, third joint a little shorter and 



narrower than the second, fourth joint distinctly shorter than the third, 



rostrum not quite reaching base of head. Pronotum about twice as broad 



as long in the middle, scarcely broader than the base of the hemelytra, 



almost trapezoidal, apical margin truncate^ lateral margins a little rounded 



from the base to a little before the middle, basal margin deeply sinuate in 



front of the scutellum, disk with four anteriorly convergent keels and a 



much abbreviated obtuse keel within the lateral angles. Scutellum 



distinctly longer than the middle of the pronotum, lateral margins 



reflexed, slightly rounded, apex obtuse. Hemelytra in the macropterous 



female reaching the base of the dorsal genital segment, corium nearly 



reaching apex of third segment, somewhat dilated and rounded near the 



base. Abdomen slightly roundedly prominent near the apical angle of the 



fifth connexival segment, lateral margins of the sixth segment straight, 



apical angles obtuse, apical margin broadly truncate, with the female genital 



lobes much projecting beyond the truncated margin. Length, 9 , 7-8 mm. 



Male unknown. 



Female : Fifth ventral segment a little shorter in the middle than at 

 the sides, the apical angles reaching apex of the middle lobes of sixth 



