4 Cincinnati Society of Natural History 



8 — Anterior tibiae swollen, rounded and spinulose externally at apex as 

 in ennearthron. Head and prothorax strongly modified in the 



male Ceracis 



Anterior tibiae narrowly triangular. The external edge straight 

 throughout and minutely spinulose. Head and prothorax not 

 modified in the male Octotemnus 



GENUS CIS Latreille 



Antennae with ten joints. The chib 3-jointed. Proster- 

 num well developed before the coxae and rather flat between 

 them. Lateral margin of prothorax acute to apex. Anterior 

 tibiae either finely produced and dentiform or simple at apex. 

 Secondary sexual modifications of the head, prothorax and 

 first ventral segments of males of many of the species. The 

 epistoma and frontal angles being sometimes the only parts 

 affected. The following twelve species are described as new. 

 Following the descriptions is a table of the eighteen species, 

 described since the publication of Col. Casey's paper before 

 referred to. In this paper, p. 78, he gives a tabular description 

 of twenty-two species of the genus Cis. Eighteen of which are 

 there described for the first time. Of the species enumerated in 

 the Henshaw check list, some of Mellies' are unknown to me, 

 and it is impossible from the descriptions or figures to tell 

 exactly what they are, and only an examination of the types 

 can positively decide, and it is possible that some of the species 

 described since may be synonymous with some of them. Casey's 

 species described in the paper above referred to (the types of 

 which I have examined) are mostly strongly characterized 

 species. I have yet some species that I think are undescribed, 

 but I await more specimens before describing them. 



Cis arizonae, n. sp. 



Form stout, elongate, cylindric. Color dark piceous, sub- 

 metallic, shining pubescence, very sparse and inconspicious, 

 arranged without order. Clypeus produced into two flat, 

 slightly upturned processes. Front flat. Prothorax one-fourth 

 wider than long, with base truncate. Apex in male produced 

 into two stout, rounded processes, obtuse at tip, and the 



