48 
Psyche 
[June 
separate the present species from cribellum, pumiloides 
Will., campechianus Towns, and subtilis Bell, all of which 
appear to be small species with relatively broad frons and 
a more or less distinct median stripe on abdomen. 
This species appears to me to form in some ways a con- 
necting link between such species as St. littoreus Hine, and 
paitillensis Fchld. which I would place in Aegialomyia 
Philip, and the more typical species of Stenotabanus as 
represented by the Genotype taeniotes Wied. and the closely 
related fulvistriatus Hine. The latter have definite vestiges 
of ocelli on a small vertical tubercle, and the vertical tuber- 
cle of the male of at least fulvistriatus is quite obvious and 
on a level with the eyes. The eye pattern of chiapasensis 
is also closely similar to that of fulvistriatus. On the other 
hand, the relatively broader frons, lack of vertical tubercle 
and abdominal pattern, seem to indicate relationship to 
littoreus. The pattern of the eye in life seems to be of little 
help in grouping these species, as fulvistriatus has a pat- 
tern very much like jamaicensis Newst., ananasi Fchld. 
and psamophilus O.S., while the eyes of littoreus Hine have 
but two green bands. Paitillensis Fchld. is intermediate, 
having three green stripes, but the middle one very narrow. 
I take this opportunity to describe the following new 
species here, since part of the material is from Chiapas, 
though it was not taken on our trip. 
Stenotabanus (Stenotabanus) litotes n. sp. 
Fig. 2 
Female. Length 9-11.5 mm., of wing 9-12 mm. Eyes 
bare, purple with two transverse green bands separated by 
a purple median band of equal width. Frons yellowish 
grey pollinose, the basal callus dark brown to black, a little 
higher than wide, not quite as wide as frons, prolonged 
above in a spindle-shaped ridge or median callus. Vertical 
tubercle small but discrete, with vestiges of ocelli and sur- 
rounded by a discolored patch which may be more or less 
bare. Subcallus yellowish pollinose, concolorous with frons, 
fading to steel grey on genae and frontoclypeus. Beard 
pale grey. Antennae dull yellowish throughout, the first 
