NOTES ON NEOTROPICAL TABANIDAE (DIPTERA). 
XI. STENOTABANUS ST ARY I N. SP. FROM CUBA* 
By G. B. Fairchild 
Gorgas Memorial Laboratory, Panama, R. de P. 
In 1923 Brunetti described Silvius punctipennis from 3 specimens 
from Sierra Maestra (Oriente Prov.) Cuba. Bequaert (1940) 
transferred the species to Tabanus (Stenotabanus) , renaming it bru- 
nettii due to pre-occupancy by Tabanus punctipennis Macquart 1838. 
Bequaert (1940) included specimens from Hispaniola and Puerto 
Rico, as well as Cuban material in the species, and noted the great 
variability in size, from 6 to 12 mm. Brunetti gives 7 to 7.5 mm., 
though Bequaert states that the paratype in Deutsches Entomolo- 
gisches Institut measured 9.5 mm. He did not study the holotype 
in the British Museum. Mr. Harold Oldroyd, at my request, very 
kindly measured the holotype and paratype in B.M. He found the 
holotype to measure 10 mm. in wing length, 8 mm. in body length; 
the paratype 8 mm and 8 mm. 
Recent extensive series collected in Cuba by P. Stary and kindly 
sent to me for study by Dr. Milan Chvala, indicate that two very 
closely similar species appear to be present. The larger of these, with 
wing lengths from 7.7 to 10.4 mm. (58 specimens measured) is 
brunettii Beq. as shown by measurements of the types. The smaller 
species, described below, has wing measurements of 5.2 to 6.5 mm. 
(17 specimens measured), so that there is a gap of over 1 mm. in 
wing length between the two populations. The means and medians 
of these measurements for the two species are 5.3 and 5.85 for the 
small species, 8.2 and 9.0 mm for brunettii. These dimensions are 
correlated with slight differences in color and wing pattern. Both 
species occur together in many localities, though brunettii appears 
dominant at higher elevations. 
The status of the forms found on Hispaniola and Puerto Rico 
will need long series for clarification. The few specimens available 
are rather intermediate in size between the two Cuban forms, but 
slightly different in wing pattern from either and from each other. 
Whether they are geographical races (subspecies) of one or the other 
of the Cuban forms, or best separated on a specific level cannot be 
* Manuscript received by the editor August 10, 1967 
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