1a 
Mesonotum and pleurie opaque, with very dense and fine 
punctures; antenne short, tapering decidedly toward tip ; 
head more or less triangular and with long, projecting 
labinm; stigma narrow, tapering posteriorly, lengthened; 
sheath rather thick and stout. IX. Amauronematus Knw. 
Last ventral segment of male excavated at tip, not obtusely 
triangularly produced; sheath of female very broad or the 
posterior tibize and tarsi thickened. 
Posterior tibiwe and tarsi very broad and flattened, 
X. Croesus Leach, 
Posterior tibize and tarsi not flattened. 
Posterior tibiw and tarsi thickened, tibize externally 
with longitudinal furrow ...-. XI. Holcocneme Knw. 
Posterior tibixe and tarsi simple; sheath very thick and 
SCOP sierra = 2! aoa oe wees saaie XII. Nematus Jur. 
Claws with short tooth within tip, tooth projecting nearly at right 
angle. 
Clypeus emarginate. 
Vertex with distinct pentagonal area. 
XIII. Pachynematus Knw. 
Vertex without pentagonal area. XIV, Micronematus Knw. 
Clypeus truncate, 
Pentagonal area more or less distinct; eighth dorsal segment 
cearinated, subproduced; sheath simple; elongate species. 
XV. Lygwonematus Knw. 
Pentagonal area wanting; sheath with distinct scopa; 
first transverse cubital frequently wanting; short, ovate 
SPOClOSi see ae a afel em seat tio elie XVI. Pristiphora Latr. 
Claws simple, without branch or tooth. 
XVII. Gymnonychus gen. nov.! 
Anterior wings with divided radial cell. 
Wanceolate cell petiolate wsccca-<0 cce saeco - sos - 5 oS XVI. Dineura Dahl, 
Lanceolate cell contracted - ....----....------.-c--- XIX. Hemichroa Steph. 
I. Genus CLADIUS Illiger. 
Cladius I. Fauna Etrusca, 2d ed., p. 27, 1807. 
Cladius pectinicornis Fourcroy. Entom. Paris., 11, p. 374, 1785. 
Cladius isomera Norton. Proc. Bost. Soc, Nat. Hist., vit, p. 223, 1861. 
The only representative of this genus in this country is the well- 
known enemy of the cultivated rose, described as new by Norton 
under the name C, isomera. An examination some years since of 
Norton’s species in comparison with the European C. pectinicornis indi- 
cated at once the identity of the two. The common European enemy 
of the rose had evidently been early imported with rose plants into 
New England, and the attention of Harris and Norton was drawn to it 
at a time when comparisons were out of the question, and it was very 
naturally described as a new species. For a full account of its habits, 
with figures, see Insect Life, vol. Vv, p. 6. 
1From yupuvos, naked, and Orvvé, claw, 
