8 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



Pyrophorus arizonicus sp. nov. 1 



(Plate III, figs./, 0.) 



Sides of the prothorax parallel, strongly rounded anteriorly; posterior 

 angles ac'ute, divergent, carinate with laterally compressed strong tubercle 

 on the pronotum immediately in front of the scutellum; pronotum bearing 

 a pair of longitudinal impressions near the base. Luminous vesicles as 

 near the lateral border as the posterior border of the posterior angles and 

 distinctly visible from below. Color dark reddish brown, vestiture not 

 modifying the color of the integument. Elytra attenuate beyond the 

 middle, the tip not mucronate. Antennal joint 3 longer than 2 and dis- 

 tinctly shorter and narrower than 4; joints 4, 5 and 6 strongly serrate, 

 not twice as long as broad; joint 11 constricted at outer third (text fig. 

 2d). 



Aedeagus with lateral lobes strongly narrowed at outer third, bearing 

 stout spine on outer side beyond middle. Lateral and distal spines 

 strongly deflexed, lateral lobes moderately densely covered with stout 

 erect hairs beyond lateral spine. Medial lobe strongly narrowed. On 

 outer third narrower than end of lateral lobes, end very slender, concave 

 above; lower chitinized plate of median lobe broader than upper plate, 

 visible from above. Median lobe not deflexed at tip. Median orifice 

 more than four times diameter of lobe from tip. 



Male, 22 mm. long, 6 mm. wide. 



Female, 25 mm. long, 7 mm. wide. 



Described from 3 cf cf , 1 9 as follows : 1 cf (type) Patagonia 

 Mts., Ariz. (U. S. N. M.), 1 9 (allotype) Arizona (Chas. Schaef- 

 fer), (paratypes) 1 c? Ramsay Canyon, Huachuca Mts., Ariz. 

 (W. M. Mann), 1 d" Arizona (Chas. Schaeffer). 



Type: Cat. No. 20462, U. S. N. M. 



Pyrophorus atlanticus sp. nov. 



(Plate III, figs, d, e.) 



Sides of the prothorax parallel to beyond the middle, then broadly 

 rounded to the apex. The posterior angles acute and divergent, prono- 

 tum slightly swollen near the base of the scutellum but not bearing a tu- 

 bercle, pronotum without discal impressions. The luminous vesicles as 

 near the lateral border as the posterior border of the posterior angles ami 

 distinctly visible from below. Color, very dark brown, vestiture short, 

 and rather sparse, not modifying the color of the integument. Elytra 



1 Since preparing this manuscript two more specimens of P. arizonicus 

 have been added to the National Museum collection. These were col- 

 lected on Indian Creek in the Animas Mts., New Mexico, July 23, 1917, by 

 Dr. C. H. T. Townsend. 



