334 ENTOMOLOGICAL SOCIETY 



margin of the fifth ventral segment in the middle reddish or yellowish, 

 the sixth ventral segment in the middle and the genital segments dark 

 testaceous, the apical angles of the abdominal segments very little and 

 obtusely prominent. Legs pale testaceous, the femora sometimes a little 

 darker in the middle. 



Mr. Van Duzee found several specimens of this insect at Ridge- 

 way and Muskoka, Ontario. Mr. Montandon has two specimens 

 from Pennsylvania. 



I am surprised to find that this handsome species is yet unde- 

 scribed, but I think it may stand in some American collections as 

 ornatus Say. Before receiving the true species of Say, I had 

 myself determined it as ornatus. Say's species is, however, 

 easily distinguished from Duzeei by the following characters : 

 the head is shorter ; the second joint of the antennae is much more 

 incrassated towards the apex (the two last joints are wanting in 

 my specimen) ; the thorax is shorter, more transverse, having the 

 lateral margins equally rounded and the greatest breadth in the 

 middle; the scutellum is shorter, more widened at base, with 

 the apex entirely black ; the basal part of the corium is more di 

 lated and more strongly rounded at the lateral margin ;.the color 

 of the hemelytra and abdomen is much lighter ; the genital lobes 

 are obliquely truncate or subsinuate at the posterior margin ; their 

 basal half (not the inner half as in Duzeei} is yellow. 



A. robustus Uhl. is also similar to ornatus, but, apart from the' 

 very different color, is easily distinguished by having the scutel 

 lum more parallel towards the base and the ventral and genital 

 segments quite differently shaped. 



4. Aradus abbas Bergr. 



This fine insect, described from Quebec, has been found by 

 Mr. Van Duzee at Sudbury, Ontario, and at Golden, N. Y. It 

 is easily distinguished from A. lugubris Fall, by the very long 

 and thin antennae, which are narrowly biannulated with white. 

 A. breviatus Bergr. is a very similar species, but the genital lobes 

 of the female are entirely different 



Being now acquainted with all the Aradidae of boreal America, 

 except Aneurus simplex Uhl. and the uncertain species of 

 Walker, I think it useful to publish a systematic list of them with 

 indications of their geographical distribution. 



In his " check-list" Prof. Uhler has enumerated, among the 

 Aradidae, a Dacerta mediospina Sign, from the West Indies. 

 The generic name of this insect is Dacerla (not Dacerta) ; it is 

 not described as an Aradid,but as a Lygaeid of the division Myo- 

 dochina ; it is not from the West Indies, but from California. 

 Signoret has only described the genus (Bull. Soc. Ent. Fr. 1881, 



