111 
XV. Genus LYGHONEMATUS Konow. 
Lygwonematus Konow. Deutsche Entomologische Zeitschrift, 1890, 11, p. 238. 
Body elongate-ovate; clypeus truncate at apex; pentagonal area more or less 
distinct; claws with short, subapical tooth; last dorsal segment of the male carinate, 
carina subproduced at apex; sheath of female simple.—Konow. 
As already indicated under the preceding genus, the characters given 
in the descriptions of the genera Pachynematus and Lygwonematus by 
Konow are insufficient to satisfactorily separate the species. For this 
reason most of the American species have been referred to the first- 
named genus. I have, however, placed two species in the genus Lyge- 
onematus which seem most typical in the characters supposedly peculiar 
toit. One of them, the European L. erichsonii Hartig, is also so referred 
by Konow. Almost all of the third group of species referred to Pachy- 
nematus could with equal propriety be placed in Lygwonematus. If it 
should seem later advisable to separate the material now referred to 
Pachynematus it could be best done, at least so far as the American 
species are concerned, on the basis of the characters indicated in the 
table of species separating groups 2 and 3, rather than on characters 
proposed by Konow. The two species referred to Lygwonematus may 
be roughly separated, as follows: 
PND dlommenm bl ache Ae etter iss ssc Gissiecisterth ieee Seances = sees aisets 1. winnipeg Norton. 
Abdomen, with four basal segments, orange yellow. ...-...----- 2. erichsonti Hartig.———— 
1, Lygzeonematus winnipeg Norton. 
1867. Nematus winnipeg Norton. Trans, Aim. Ent. Soc.,1,p.198. (Cat., ete., p. 60.) 
Female.—Length 8 mm.; very robust; clypeus truncate; lateral 
ridges of ocellar basin low, indistinct, frontal crest wanting; fovea 
sinall, shallow (antennie wanting); venation normal; stigma elongate, 
circular on lower margin; sheath broad, rounded at apex; cerci slender, 
tapering. Color black; head and. thorax opaque; abdomen shining; 
clypeus in part, labrum, angles of pronotum, tegulie, apex of abdomen 
dorsally and ventrally, apices of coxee, trochanters, and legs for the most 
part yellowish ferruginous; anterior femora brown on lower margin, 
posterior femora with the brown extending over the sides, especially 
apically; extreme apices of posterior tibice: and tarsi somewhat infus- 
cated; veins, including costa nearly to base and stigma, brown. 
One female, Cresson’s type; a much-damaged specimen. Iludson 
Bay territory (Lake Winnipeg?). (Coll. Am. Ent. Soc.) 
The males referred to in the original description have been lost. 
2. Lygeonematus erichsonii Hartie. i 
1837.' Nematus erichsonii Hartig. Fam. Blatt. Holzwesp., p. 187. 
1880. Nematus notabilis Cresson. Trans. Am. Ent. Soc., vit, p. 7. 
! Later European references are omitted, 
