98 GEO. H. HORN. M. D. 



fourth plicate, while the female has the perforated tubercle on the third 

 as an illustration of the persistent avoidance of any sexual mark on the 

 fourth ventral of the female. To this group should be referred two 

 species described by Erichson, but no mention is made of any peculiari- 

 ties in the form of the head ; the species are fulvipes, from Porto Rico, 

 and dispar, from Columbia. It is remarkable that in twenty species de- 

 scribed by Dr. Sharp from Brazil (Trans. Ent. Soc. Lond. 1876), there 

 is not one which can be referred to this series. As far as at present 

 known we have but one. 



16. C. prospiciens Lee. — Pale brown, moderately shining, sparsely pu- 

 bescent. Antenu;e shorter than the head and thorax, pale brown, third join*" 

 longer than the second. Head oval, eyes more prominent than usual, sides of 

 head behind the eyes arcuately narrowing, so that the posterior portion of the 

 head is nearly semi-circular in form, surface rather sparsely obsoletely punctured. 

 Thorax narrower than the head, about one-fourth longer than wide, sides parallel, 

 a median smooth space, on each side of which the punctures are fine, sparse and 

 indistinct. Elytra one-third wider than the thorax and distinctly longer, the 

 punctuation fine and sparse, and the pubescence more persistent than usual. Ab- 

 domen finely and moderately closely but very indistinctly punctate. Legs rufo- 

 testaceous. Length .34-. 36 inch ; 8.5-9 mm. 



Male {Complete form). — Third ventral segment simple, fourth with a small 

 fovea at centre and a narrow lobe from the middle of the hind margin extending 

 beyond the fifth segment; seventh ventral with a triangular notch wider than 

 deep (PI. 2, fig. 10). 



Female — Third ventral with a small tubercle at centre slightly perforated at 

 summit (PI. 2, fig. 12). 



This species is remarkable in combining the male sexual characters of 

 two series by the presence of the fourth ventral lobe and the emarginate 

 seventh ventral. 



In the male in my cabinet the lobe of the fourth ventral is rather 

 broader and longer than in the specimens in Dr. LeConte's cabinet, and 

 the fovea is more distinctly a plica. 



Occurs in Texas and Arizona, five specimens. 



Series C. 



The males of the species here placed have the terminal ventral seg- 

 ment emarginate either in triangular form or with a deeper incisure with 

 parallel sides. The fourth ventral is without trace of lobe, and with the 

 exception of two species {properum and nachim) there is no trace of 

 fovese on the ventral segments. 



In the accompanying table the series is primarily divided into two por- 

 tions including, first, those with the head of the usual form of the genus, 

 and secondly, those with the head rapidly narrowing from the eyes to 

 the constriction of the neck. 



