16 Bulletin of the Brooklyn Entomological Society Vol. XII 



At the time of receiving the specimens, a brief reference to 

 Horn's synoptic table showed clearly that the only possible previ- 

 ously described species to which they could be referred was con- 

 jungens Horn. A difference of some four hundred miles in habi- 

 tat is practically a guarantee of specific distinctness in this genus, 

 but as conjungens was not represented in my collection I thought 

 best to wait until I could compare with the type of the latter be- 

 fore going further. This I had the satisfaction of doing this 

 past summer, and although the two forms are closely allied, I 

 believe them to be quite distinct. As for the differences : First 

 of all, conjungens is a black species, and badia is brown. All three 

 examples of the latter are alike, and the color is in no way due 

 to immaturity. Badia is sensibly larger — length 26-28.5 mm., 

 conjungens 23 mm. The antennae are of the same type, but the 

 lamella of the fifth joint is nearly as long as those immediately 

 following in conjungens, distinctly shorter in badia. In badia the 

 thorax is hairy at the middle in front, in conjugens it is entirely 

 destitute of hairs. The punctures of the flattened and impressed 

 antero-medial area are more conspicuously coarser than those of 

 the rest of the surface in badia, and the geminate striae of the 

 elytra are feebly defined ; in conjungens the geminate striae are 

 quite distinct. 



It is of interest to note that the point on the Mt. Wilson trail 

 where badia was found is scarcely five miles west of the little 

 caiion in which P. australis was discovered a few years ago. 

 These two species by their antennal differences belong to different 

 sections of the genus. 



SYNOPSIS OF THE SPECIES OF ARTHROMACRA. 



By Charles W. Leng, West New Brighton, N. Y. 



In the fall of 1915, Mr. Wm. T. Davis and I spent a week in 

 Washington, making daily visits to the U. S. National Museum 

 and learning more from our intercourse with Mr. E. A. Schwarz 

 and Mr. H. S. Barber than can readily be prepared for publica- 

 tion. The following remarks will however record one of the 

 subjects that was thus brought out. 



