1913.] NATURAL SCIENCES OF PHILADELPHIA. 439 



Nemobius ambitiosus Scudder. 



1877. Nemobius ambitiosus Scudder, Proc. Bost. Soc. Nat. Hist., XIX, 



pp. 81, 82. (Original description.) [Fort Reed, Fla.] 

 1896. Nemobius ambitiosus Scudder, Jn. N. Y. Ent. Soc, IV, pp. 99, 104. 



[Fort Reed, Charlotte Harbor, Sandford, Indian River, and Jacksonville, 



Fla.] 

 1896. Nemobius ambitiosus Scudder, Psyche, VII, p. 432. [New key.] 

 1902. Nemobius ambitiosus Blatchley, A Nature Wooing, pp. 40, 223. 



[Ormond, Fla.] 

 1905. Nemobius ambitiosus Rehn and Hebard, Proc. Acad. Nat. Sci. Phila., 



1904, p. 800. [Thomasville, Ga., Leon County, Fla. In pine straw.] 

 1905. Nemobius ambitiosus Rehn and Hebard, Proc. Acad. Nat. Sci. Phila., 



1905, p. 50. [Miami, Tampa, Fla. In dead leaves.] 



1907. Nemobius ambitiosus Rehn and Hebard, Proc. Acad. Nat. Sci. Phila., 

 1907, p. 317. [Pablo Reach, San Pablo, and Gainesville, Fla. Under- 

 growth in pine woods and in palmetto scrub.] 



1909. Nemobius ambitiosus Hebard, Ent. News, XX, p. 115. [Thomasville, 

 Ga. Frequent in pine woods. December.] 



1911. Nemobius ambitiosus Rehn and Hebard, Proc. Acad. Nat. Sci. Phila., 

 1910, p. 596. [Bainbridge, Ga.] 



1911. Nemobius ambitiosus Allard, Ent. News, XXII, p. 156. [Thompson's 

 Mills, Ga. One of the commonest and earliest species.] 



1912. Nemobius ambitiosus Rehn and Hebard, Proc. Acad. Nat. Sci. Phila., 

 1912, p. 273. [Miami and Homestead, Fla. Undergrowth in pine woods.] 



This trim insect may be immediately distinguished from all other 

 North American species of the genus by the very strilving marlvings 

 of the head and the usually distinctly striped caudal femora. More- 

 over, in the males, the evenness of the dorsal field of the tegmina, 

 which is bounded by a pale narrow line not only laterad, but caudad 

 as well, gives this sex a very clean-cut appearance, while the scarcely 



Figs. 13 and 14:.^Nemobius ambitiosus. Cephalic (Fig. 13) and dorsal (Fig. 14) 

 aspect of color pattern of head. (X 4.) 



enlarged apical portion of the ovipositor in the opposite sex is dis- 

 tinctive. 



The insect is a very aberrant member of the subgenus Allonemohius. 

 Although a small amount of variation exists in size, proportions, and 

 tone of general coloration, the peculiarly striking color pattern is 

 constant in the present species. 



Described from a series of eleven specimens from a single locality. 



Single type here designated: 9 ; Fort Reed, Florida. April 20-22, 

 1876. (Comstock.) [Scudder Collection.] 



We here describe a female from Gainesville, Fla., taken August 

 16, 1905, in the undergrowth of the pine woods by Rehn and Hebard. 

 29 



