Jrom the Rio Nautla, State of Vera Cruz. 281 
black. Wings pronouncedly black, except narrow limpid 
hind margin. The abdomen is generally, especially in the 
female, more distinctly orange-coloured. 
This somewhat arbitrary separation of these two forms 
must be borne with till actual field observations prove their 
true relationships. 
Both pennipes and pilipes were described by Fabricius and 
Wiedemann from the male, and the descriptions both apply 
well in regard to the postsutural golden markings of meso- 
notum. As before stated, these markings are quite con- 
stantly characteristic of the male in both varieties. Phasia 
jugatoria, Say, Ocyptera ciliata, Fabr., T. pyrrhogaster,Wied., 
and 7. haitensis, Desv., therefore all become synonyms of 
T. pilipes, Fabr., since all are dark-winged forms. Although 
Wiedemann designated the female in his description of 
T. pilipes, it is quite certain, from his diagnosis, that he was 
describing the male. The others seem all to have been 
described from the female (not including pennipes). 
7’. flavicornis, Desv., is another variety of pennipes, chiefly 
distinguished by its yellowish antenne. 
41. Trichopoda histrio, var. indivisa, var. n. 
One male. San Rafael, June 30. On flowers of the 
Cordia sp. 
Length 9 millim. 
Fifth and sixth segments of abdomen thickly and densely 
deep golden-yellow pollinose. Fourth segment thinly so, 
showing a continuous golden surface only when viewed from 
in front parallel with the plane of the tergum. Second and 
third segments showing some silvery pollen when viewed in 
same way. No fascie, therefore, are shown on the abdomen, 
but a continuous pollinose surface, without interruption to the 
pollen on the median line. ‘The fuscous of costal half of 
wing is very largely yellow, except at its base, tip, and on 
its posterior border, where it is more deeply smoky. Other- 
wise agrees well with Loew’s description of trifasciata. It 
is thus seen that this form varies widely from the typical 
histrio in the pollen of abdomen, doubtless representing a 
Mexican or neotropical variety. 
T. trifasciata, Loew, may be continued as a variety of 
histrio. Walker’s specimen, which must be taken as typical, 
possessed only two abdominal fascie. It will be well to 
designate the form with three and four fascie by Loew’s 
name. 
The forms of histrio are entirely destitute of cilia on the 
hind femora. 
Ann. & Mag. N. Hist. Ser. 6. Vol. xx. 20 
