SCUTELLEROIDEA OF IOWA 39 
punctate, more finely and closely punctate towards tip which is narrow, 
depressed and extends beyond the inner border of the corium. Hemelytra 
wide, shining black and coarsely punctured at base; tinged with rufous 
and more finely and closely punctured near tip; marginal area very large 
and finely punctate; membrane white tinged with brown at base. Venter 
black, shining; faintly, finely and sparsely punctured on disk, the sides 
more deeply punctured, often minutely wrinkled. Side pieces of pro- 
thorax coarsely punctured, the other thoracic plates polished, impunctured. 
Ostiolar canal long, the tip ending in a rounded lobe. Legs shining black, 
the tarsi pale testaceous; tibiae furnished with many long, slender spines 
arranged in whorls. Length, 3.75-4.25 mm. Width across pronotum, 
2.0-2.25 mm. 
This is the smaller of our two black cydnids and is also our 
only representative of the Cydnini which is shining black; in 
addition, it may be distinguished from our other species by its 
broadly ovate form and the long ostiolar canal the tip of which 
is covered by a rounded lobe. 
This eydnid, the only Iowa representative of the genus, was 
first recorded from the state by the writer as Geotomus parvulus 
Signoret (/. c), two specimens bearing labels with the following 
data having been discovered in the collection of the Iowa State 
Agricultural College: ‘‘Exp. Sta., 5-18-’97, Ames, Ia.’’ How- 
ever, after further study of these specimens I am compelled to 
retract my former determination and to refer them to G. robustus 
Uhler. Although they differ in some minute details from Uhler’s 
description and Signoret’s figures of robustus, the form, punc- 
tuation and size place them in that species while the shape of the 
ostiolar canal more nearly approaches that of parvulus. But in 
the other specimens of undoubted robustus that I have examined 
the ostiolar canal varies somewhat so that the weight of evidence 
favors the placing of these specimens in robustus. The known 
distribution of this species also suggests the lkelihood of its 
occurrence in Lowa. 
While the legend quoted above does not necessarily indicate 
' that the specimens were taken in [owa it is reasonable to infer 
that they were. As suggested in my previous paper, this may 
possibly be the species to which Professor Osborn referred in the 
Proceedings of the Iowa Academy of Science, Volume V, 1897, 
page 232 where he lists ‘‘Geotomus sp.’’ from Iowa. No other 
records of this form are at hand. 
