Dec. 1898.] Dyar: Ltfe-Histories of N. Y. Slug Caterpillars. 241 



veins on the outer part of the wings. Hind wings transparent, fringes fuscous, nar- 

 rowly orange at base. Underside of fore wings golden-orange with the veins on 

 outer part violet. Hind wings beneath same as above. Antenna? black. Expanse, 

 22 mm. 



i 9, Summit of Mt. Union, 9,000 feet, Arizona, July 3, 1887, 

 flying about scrub oak (G. D. Hulst). Coll. Hy. Edwards. 



1 Q , Texas. Coll. U. S. Nat. Mus. 

 Pyrrhotsenia coccinea, sp. nov. 



Head black ; palpi yellow, tip black ; collar narrowly edged with white in front. 

 Thorax and abdomen bronzy-black with a metallic reflection. Antenna; brown-black. 

 Underside of thorax with a scarlet patch on each side. Legs metallic blue-black. 

 Fore wings bright scarlet-red, outer border and a round spot at end of cell bronzy- 

 brown. Hind wings brown. Underside of fore wings light orange, outer part brown, 

 discal spot much reduced. Hind wings beneath same as above. Expanse, 12 mm. 



i 9, Albuquerque, New Mexico. (Cockerell.) Type, Coll. U. 

 S. Nat. Mus. 



Very different from any of the hitherto known species. It may be 

 at once recognized by the bright red fore wings with brown outer bor- 

 der and discal spot. 



THE LIFE-HISTORIES OF THE NEW YORK SLUG 

 CATERPILLARS.— XVII. 



PLATE XI, FIGS. I-I2. 



By Harrison G. Dyar, A.M., Ph.D. 



Heterogenea shurtleffii Packard. 



1S64 — Heterogenea shurtleffii Packard, Proc. Ent. Soc. Phil. Ill, 346. 



1882 — Heterogenea shurtleffii Grote, Check List. p. 18. 



1S91 — Heterogenea shurtleffii and var. aesonia Smith, List Lep. p. 29. 



1892 — Heterogenea shurtleffii Kirby, Cat. Lep. Het. I, 556. 



1S94 — Heterogenea ccesonia ? Neumcegen & Dyar, J. N. Y. Ent. Soc. II, 74. 



Special Structural Characters. 

 Dorsal space rather narrow and of uniform width, narrowing a lit- 

 tle posteriorly, but scarcely so anteriorly ; full, rounded, not concave. 

 Sides obliquely concave ; subventral space small, retracted. Ridges 

 at first prominent, with large, low, distinct segmentary tubercles ; 

 later the subdorsal ridge indicated by the change in direction between 



