1941] 
Amber Aradidae 
95 
TWO NEW SPECIES OF ARADIDAE FROM BALTIC 
AMBER (HEMIPTERA) 
By Robert L. Usinger 
University of California, Davis 
A considerable collection of Hemiptera from Baltic Amber 
was received some time ago through the kindness of Prof. 
F. M. Carpenter. Of this material the aphids were exam- 
ined by Prof. E. 0. Essig, the scale insects by Prof. G. F. 
Ferris, and a beautifully preserved Tingitid by Dr. C. J. 
Drake. Two well preserved Aradids are treated in the 
present paper while the remaining specimens, mostly Ful- 
gorids, Cicadellids, and Mirids, are as yet unstudied. 
Only three species of Aradidse, e.g. Aradus supiestes, 
assimilis and consimilis, and one Aradid nymph were re- 
corded from Baltic Amber by Germar and Berendt. 1 Al- 
though specimens of these species have not been examined, 
the descriptions and figures clearly indicate that they con- 
form to our present day definition of the nearly cosmopolitan 
though presumably originally holarctic genus Aradus. The 
present material is of more than usual interest in that the 
two species are the first representatives of their respective 
tribes in Baltic Amber. Moreover, the Calisius is the first 
representative of its tribe to be recorded from the fossil 
record. 
Calisius balticus Usinger, new species 
Oblong-ovate with sides subparallel, head transverse and 
antennae relatively long. 
Head one-eighth shorter than broad, 21 : :24 ; tylus slightly 
dilated at about middle, scarcely surpassing level of apices 
of second antennal segments ; antenniferous tubercles short, 
iGermar, E. F. and G. C. Berendt. Die im Bernstein befindlichen 
Hemipteren und Orthopteren der Vorwelt. In Berendt, G. C. Die im 
Bernstein befindlichen organischen Reste der Vorwelt. Berlin. Band 
II, Abth. I. pp. 22-23, Tab. II, figs. 11-13, Tab. Ill, fig. 17. 1856. 
