ARGIA, 95 
1 9, in copulé| (coll. Adams), San Felipe Valley (coll. Elrod), San Bernardino 
(Truman, coll. P. P.C.: 16,49), San Rafael, The Geysers, Sonoma County 
(A. Osten Sacken, M. C. Z.), all in California (A. N.S: 7 3), Wild Cat, &c., Marion 
Co., Arkansas (coll. Adams: 3 ¢,1 2), Round Mt., Texas (A. V. S., coll. P. P.C.: 
16 ¢, 6 2); Lower Catirornis, Lower Purisima? (Haines, coil. P. P. C.: 3 3), 
Comondu?, Sierra El Taste?, Sierra Laguna’, Mesa Verde 2, and Cape San Lucas !.— 
Mexico, Monclova in Coahuila (Dr. Palmer, M.C.Z.: 3 3, 12), Diente near Monterey, 
Nuevo Leon (Rhoads: 7 3,4 2), Jalapa (Trujillo: 5 3), Xico (Barrett, coll. P. P. C.: 
2 3) and Texolo (Rhoads: 12 6,7 2) in Vera Cruz, Cuernavaca (Barrett, colls, 
Adams, P. P.C.: 13,4 2; coll. Deam: 13,9 2). 
Found in Montana in June; in Texas in January, March, April, May, and November ; 
in Cuernavaca in July and October. 
In this species the pale antehumeral stripes are usually more than half as wide as 
the black mid-dorsal. The smallest width stated above is found in individuals from 
Texolo and Xico, which thus have a different appearance from that usnally possessed 
by A. vivida. But since a gradual transition to this predominance of black exists, and 
I have not been able to find any other constant differences, in the males at least, they 
are here referred to A. vivida. As regards the females from ‘lexolo, some differences 
in the mesostigmal lamine are discernible :—Three females have the laminz prominent, 
angulate externally (see Tab. LV. fig. 1), as in the females from Montana and California 
noted above as having been taken in copuld, blue predominating over black on the 
thoracic dorsum ; black markings on segment 2 never of the form seen in A. extranea ¢ ; 
the postbasal black streaks on 3-5 not connected with the apical black, except in one 
individual. Four females have the lamine prominent, produced outward at their 
external angle (Tab. IV. fig. 2), otherwise as in the three specimens of that sex 
mentioned above. Similar lamine are possessed by the five females enumerated from 
Jalapa, which, however, have the pale colours on the thoracic dorsum violet instead of 
blue, this violet predominating over the black, and the postbasal streaks on segments 
4 and 5 connected with the apical black. 
The female “un peu douteuse,” which Selys described ! as that of A. vivida, is stated 
to have the mesostigmal lamine “nulles, représentées par le bord de V’échancrure un 
peu en créte,” and three antenodal cells. ‘These characters would suggest the female 
of A. immunda, and I find also in Texan females of this latter species “le 9™ 
[abdominal segment] ayant de chaque cété une tache basale plus pale.” The 
identification of the female of A. vivida which I have adopted in the present work 
(and in my previous paper *) rests upon the pairs noted above as having been taken 
in copuld. 
