PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM 
SMITHSONIAN INSTITUTION 
U.S. NATIONAL MUSEUM 
Vol. 92 Washington : 1942 No. 3133 
NOTES ON TWO GENERA OF AMERICAN FLIES OF THE 
FAMILY TRYPETIDAE 
By Joun R. Matiocu 
Tuis paper presents notes on the species of the genera 7’rypanea 
and Neaspilota, including those described by Coquillett and Benja- 
min, the types of these being in the collection of the United States 
National Museum in Washington. 
Genus TRYPANEA Schrank 
1795. Trupanea ScHRANK, Naturhistorische und 6konomische Briefe tiber das 
Donaumoor, p. 147. 
It is known that there are a number of exotic species of 7'rypanea 
that show rather marked sexual dimorphism, but there are no records 
of such cases in America. In several species there are just as marked 
distinctions between the sexes as are met with in other regions and 
these are dealt with below. Unfortunately there are comparatively 
few records of food habits of the larvae, but what I have been able 
to gather from all sources are included herein. 
The genus as accepted by me contains species with the following 
characters: 
Characters of the genus—Head not exceptionally elongated, usu- 
ally a little longer than high, with the frons flattened and longer 
than its width at vertex, narrowed slightly in front, the inner pair 
of vertical bristles the longest on the head, the outer pair very much 
shorter; supraorbitals two in number, the upper one short and yel- 
low; infraorbitals usually three pairs, the anterior pair usually much 
the shortest and sometimes not developed, usually dark colored, and 
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