ZESHNA. 183 
The Mexican and Central-American individuals have no dark line on the fronto- 
nasal suture, the blue or green stripes on the thorax narrower *, the median dorsal 
tooth on abdominal segment 10 of the males less prominent and less acute, and the 
anteapical part of the superior carina of the superior appendages lower than in the 
individuals from South America which are before me, except that of the two females 
from Venezuela one (with the S&o Paulo female) has no dark line on the fronto-nasal 
suture and the other has it very faintly indicated. Some of these differences have 
already been mentioned * for specimens from Lower California. The Brazilian males 
do not differ from the Mexican in size or in venation. 
44. cornigera belongs to a group of species whose other members, so far as I have 
studied them, are californica, Calv., of North America, and marchali, diffinis, 
bonariensis, confusa, Ramb., galapagoensis, Currie, and a few unnamed forms from 
South America; from all of these the male cornigera differs in having no inferior 
tubercle on the superior appendages and in the slightly shorter inferior appendage, 
which is one-third to two-fifths as long as the superiors. (Since writing the above 
Dr. Ris has published an apparently somewhat different view, /. c.° p. 24.) 
2. Aishna multicolor. 
| Aischna multicolor, Hagen, Syn. Neur. N. Amer. p. 121 (1861)*; Rep. U.S. Geol. Surv. Terr. 
1872, p. 727 (1878) ’; lc. 1873, p. 591 (1874)?; Calvert, Proc. Calif. Acad. Sci. (2) iv. 
p. 508, t. 15. figg. 25, 26 (apps. g) (1895) *; Trans. Amer. Ent. Soc. xxix. p. 43 (1902)’; 
Currie, Proc. Ent. Soc. Wash. v. p. 303 (1903) °; 1. ¢. vii. p. 18 (1905) *. 
Aischna mutata, Hagen, Syn. Neur. N. Am. p. 124 (1861) *. 
4tschna furcifera, Karsch, Ent. Nachr. xvii. p. 310 (1891) ’. 
A difference in the width of the pale (blue or yellow) stripes on the sides of the thorax is visible in the 
present material, the specimens from the United States, Lower California, Mexico city, Sta. Maria’, the female 
from Jalapa and one male from Amula having these stripes about 1 mm. wide, those from Chiriqui, Irazu, 
and the males from Amula and Jalapa, having them about ‘5 mm. wide, while transitional widths are offered 
by the individuals from Tacubaya and San Gerdénimo. No such approximate correlation with geographical 
‘distribution exists in the dimensions of the abdomen and wings. 
Hab. British Cotumsia, Victoria °, Ainsworth (Kootenay)’; Unirep States +, Upper 
Missouri ', Yellowstone, Red Butte Cafion in Salt Lake Co., Utah [O. W. Browning : 
* Antehumeral stripes ‘5-1-0 mm. wide, mesepimeral ‘5-1-0 mm., metepimeral :7-1:0 mm. The Sao Paulo 
9 has the antehumeral stripes as narrow. 
+ In 1895* I also gave Beadle Co., Dakota, as a locality for this species, and the late Mr. R. J. Weith, on 
the basis of a determination by myself, added Elkhart, Indiana (Ent. News, xi. p. 641, 1900; ef. Williamson, 
Proc. Indiana Acad. Sci. 1900, pp. 178, 176). The Dakotan individual, a female, had been seen by Dr. Hagen, 
who agreed to my determination of it as multicolor, but I do not now believe it to be this species, since it 
lacks the spinulose ventral tubercle of abdominal segment 1. Mr. Louis Weith has kindly searched in his 
father’s collection for the specimens (all females) which I identified in 1900 as multicolor, but has not found 
them; the single female labeled multicolor in his father’s handwriting which he sent to me also lacks the 
tubercle. Indiana is therefore to be dropped from the distribution of this species. 
