30 JouRXAL Xew York Entomological Society. [Vol. xix. 



shining, the former almost smooth ; the latter, for the most part, coarsely 

 punctate. Venter dull bronzy black, provided with scattering, pale, appressed 

 hairs, intermixed with which are some longer seta;. Lateral margins to 

 beyond the stigmata rufescent. Occasional specimens have traces of red on the 

 disc of the venter, especially anteriorly. Individuals also occur which have 

 the lateral rufescent band broken up, leaving a spot at each incisure, red. 

 Melanic individuals occur which have the pronotum and hemelytra infuscated 

 all over. Legs with femorse black, almost devoid of pile, a few short, stiff 

 hairs on the tibia;. Tibiae are pale except at extreme base and apex. Basal 

 two thirds of tarsi pale. About four long spines on the hind femora, with 

 two short, bkmt subapical teeth. Length of J', lo mm.; J, 1 1 mm. 



Described from twenty-five males and five females collected by 

 me in tbe Huachuca Mountains, Arizona, in 1905. They were ob- 

 served on the hillside of a canyon, flying about among the dead leaves- 

 and on the bare ground beneath the stunted oak trees. They pre- 

 sented a very peculiar appearance as they flicked their wings, expos- 

 ing the bright red abdomen, and behaving very much as some of the 

 AIutillidK do. 



I (2). Lateral margins of pronotum callosed, impunctate, pale. Humeral angles 

 of pronotum acute pilosiilus H. Schf. 



2(1). Lateral margins of pronotum thinly impressed, rarely pale. Humeral 

 angles obtuse or rounded. 



3 (4). Membrane pale, spotted with brown. Hairs sparse on the pronotum. 



Scutellum velvety black, with smooth, callosed, rounded apex. 



const^crsKS Mont^ 



4 (3). Membrane usually dark, not spotted with brown. Scutellum pale, 



acute, not specially callosed. 



5 (6). With nervures of membrane somewhat anastomosing. Hind 



femora provided with a pale annulus before apex. 



scutellalus \'an D. 



6 (5). \\'ith nervures not anastomosing and but little branched. 



7 (12). Pronotum coarsely punctate, usually black or bronze black 

 species. 

 8(ti). Abdomen beneath bronze black. Connexivum with pale 

 spots at incisures. 



9 (10). Head, pronotum and legs furnished with rather 



close set, long pile eiiriniis Say. 



10 (9). Head, pronotum and legs furnished with shorter 



and sparser hairs. Form more robust, pliito Uhl. 

 II (8). Abdomen beneath pale. Hind coxa; set further apart 



than in eurinus setosiis Van Duz.. 



12 (7). Pronotum more finely punctate, fulvous brown. Abdomen be- 

 neath bronze black, with ventral margin, broadly rufescent^ 



riifescens n. sp. 



