ARADUS. 65 
Fam. ARADIDZ. 
This family is represented in Central America by about the same number of species 
as the Tingitide, and by nearly as many genera, viz. twenty-three, two only of these 
being at all numerous in species, e. g. Brachyrrhynchus and Newroctenus. Dr. Bergroth 
(1892) gives the total number of Nearctic Aradide as thirty-six (belonging to five 
genera), of which twenty-five belong to the one genus Aradus; and of the Palearctic 
species as sixty-seven, with the same number of genera. The Neotropical Aradide are 
of sluggish habits, living under the bark of decaying trees, often in gloomy places in 
the forest. With one exception, Aradus falléni, Stal, the whole of the Central-American 
species belong to the Brachyrrhynchine, the rostrum in this subfamily being very 
short and received in a deep groove along the underside of the head. All the known 
American genera but one *—WMelanosterphus, Stél—are represented within our limits, 
whence five others are added. Some of the species are very local, and the males appear 
to be very much rarer than the females. We possess two pairs still 7m coitu, showing 
that the female is placed above the male during copulation. 
I am indebted to Dr. Bergroth, who has made these insects his special study for many 
years, for the loan of several of his types, as well as for a great deal of assistance in 
working out the large number of Central-American species; and also to Dr. Aurivillius 
for the loan of various American Aradidée described by Stal. 
Subfam. ARADINA. 
ARADUS. 
Aradus, Fabricius, Syst. Rhyng. p. 116 (part.) (1803) ; Fieber, Europ. Hemipt. pp. 34, 110 (1861) ; 
Stal, Enum. Hemipt. iii. p. 185; Bergroth, Proc. Ent. Soc. Wash. ii. p. 335. 
Piestosoma, Laporte, Essai Class. Syst. Hémipt., in Guérin’s Mag. Zool. 1832, p. 35. 
Subg. Quilnus, Stal, Enum. Hemipt. iii. p. 187 (1878). 
Aradus includes no fewer than ninety-four described species, a large proportion of 
which are from the Palearctic or Nearctic regions. A single species only is known to 
me from Central America f. 
* Phimophorus, Bergr., appears to be a Reduviid. 
ft Dr. Bergroth has also recorded two other species of the genus from within our limits, but it is possible 
there is some mistake about the localities. They are as follows :—A. crenatus, Say, from Mexico (Wien. ent. 
Zeit. xiv. p. 168); and A. quadrilineatus, Say, from Panama (Proc. Ent. Soc. Wash. ii. p. 335), on the 
authority of Uhler. 
BIOL. CENTR.-AMER., Rhynch., Vol. IT., April 1898. 9 
