Il6 STUDIES IN NORTH AMERICAN MEMBR ACID.E 



Genus Centrodontus Goding. 



Centrodontus atlas Goding. PI. 2, fig. 36. 



The male of this species, of which I have received a series 

 from Prof. Wickham which were taken at St. George, Utah, 

 agrees exactly with the description of Dr. Goding's Gargara 

 atlas. His description of genus Centrodontus however, founded 

 purposely for this species, fails to correspond in several import- 

 ant particulars. He states that the head is "spindle shaped" 

 whatever that may mean; that the feet are simple while here 

 they are strongly flattened in the male, almost foliaceous in the 

 female; and that the scutellum is bidentate at its extremity, 

 with the posterior process of the pronotum lying between 

 these teeth. In this insect there is no scutellum as I have 

 learned by dissecting one of my specimens I believe that my 

 determination of the species is right and that Dr. Goding was 

 misled by the pale alternations on the carinated margins of the 

 posterior pronotal process. The male tibiae if viewed from 

 before would appear simple. I may add that the dorsal line of 

 the pronotum is strongly bisinuate in the female. 



Genus Philya Walker. 



Philya ferruginosa Goding. PI. 2, fig. 38. 



The Cornell University collection contains a good series of 

 this species that were taken in Arizona by Mr. H. K. Morrison. 

 Dr. Uhler sent it out under the MS name Enchenopa gracilis 

 but Dr. Goding described it under the present name in genus 

 Acchmorpha Stal which Canon Fowler places as a synonym of 

 the earlier Philya of Walker. Acchmorpha californensis Go- 

 ding is still unknown to me. 



Subfamily Centrotida Stal. 



The Centrotida are but poorly represented in our North 

 American faana. I know of but five species representing as 

 many genera, which have been reported or collected within our 

 limits. A good synopsis of the American genera may be found 

 in the Hemiptera Fabriciana, ii, pp. 47-49, and a later and 

 more up to date table is in the Biologia, Homop. ii, pp. 146- 

 148. As but one of our genera is included in Stal's table and 

 two in Fowler's I have prepared a new one that may be of as- 



