256 Bulletin of Laboratories of Denison University [Voi. xi. 
Boreus unicolor sp. 
Length of female including the ovipositor 5 mm. En- 
tirely black, without the striking metallic luster of calif ornicus , 
and of brumalis. The ovipositor is nearly 2 mm. in length, 
being longer than any other North American species. The 
large size and long ovipositor separate it from our eastern forms 
and the black ovipositor and wing pads distinguish it from 
calif Of fiicus. 
Two female specimens in the Hubbard and Schwarz Collec- 
tion, taken at Helena, Montana, on the 26th of April. 
Bittacus Latreille. 
The genus Bittacus was described by Latreille in 1807, in 
Genera Crustaceorum et Insectorum to receive the European 
species italica Muller, tipularia Fabricus, which hitherto had 
been placed in Panorpa. 
The head is small, and largely occupied by the conspicuous 
compound eyes, the mandibles are widest at the base, and 
gradually narrowed distally, the distal end is curved and pointed 
and preceded by a sharp tooth. The maxillae are peculiar in 
the large development of the maxillary palpi in comparison 
with the other parts; the labium is short bearing two-jointed 
palps at its distal end. The legs are longer than the wings, 
which are ample and in most cases without conspicuous mark- 
ings. 
Bittacus stigmaterus the first american species was described 
by Say in the Western Quarterly Reporter, 1823, 2-173. In 
1836 Klug published in Abhandl. Acad. Wiss. Berlin, a descrip- 
tion of mexicanus from Mexico. In 1841 Westwood described 
pilicornis, punctiger pallidipe^mis in Trans. Ent. Soc. of Lon- 
don 4-195-6. In 1853 Walker described occidentis in Cat. Brit. 
Mus. 469. In 1861 Hagen, in his Synop. Neurop. N. A. 246, 
described strigosus, and on page 248 published for the first 
time, a description of apicalis from Uhler’s manuscript; In the 
same work he announces that pallidipennis is synonomous with 
stigmaterus. In 1871 McLachlan described apterus in the Ent. 
Mon. Mag. 8-100, and in 1881 chlorostigma in the sameperiodi- 
cal, 18-36. 
