OF WASHINGTON, VOLUME XIX, 1917 5 



Candeze in his Monograph places phyxodentx ( !ermar among 

 those forms having a tubercle at the middle of the base of the 

 prothorax. I believe this to be an error and that the specimen 

 before Candeze was not the physoderux of Germar, but a then un- 

 described species. He gives the locality as Mexico and Southern 

 United States. To the form which he described, I have given 

 the name Pyrophorus texanus. Germar does not mention the 

 pronotal tubercle in his description of the species and as he men- 

 tioned it in several of his other species, I believe that this char- 

 acter alone can eliminate the Arizona and Texas species from 

 physoderus of Germar. 



The genitalia of Pyrophorus (Text fig. I) can be divided into 



- 





I Fig. 2. Antennae of Pyrophorus. a, P. lexanux; h, P. 

 aManticus; d, P. ariznnicus. 



//*, c, P . 



two parts, the azygotic portion lying anterior to the junction of 

 the seminal ducts and the zygotic portion lying posterior to this 

 junction. The zygotic portion consists of the testes (tes.), the 

 accessory glands (ac. gl.) and the seminal ducts (sm. du.} and 

 9 without the scope of this paper. The zygotic portion con- 

 sts of the ductus ejaculatorius (ej. du.) and of the aedeagus. 

 In most coleopterous males, the azygotic portion is divided into 

 a widened internal sack and a slender stenazygotic portion. In 

 the Klateridae, however, these parts are undifferentiated. The 

 ledeagus is divided into the tegmcn and the median lobe. The 

 tegmen consists of a basal, ring-like, articulating plate (Ixiwd />.) 

 and two opposed scoop-shaped lateral lobes (lot. loh.), one on 

 Cither side of the median lobe (med. lob.}. The median lobe 

 has a heavily chitinized dorsal part with two median struts 

 (vied. .s7.) on its upper surface and the median orifice anrd. or.) 



