The Sphegoidea of Nebraska 61 
2. Pulvilli small and indistinct; meso- and metanotum spotted; 
all dorsal abdominal segments with continuous fasciae; 
Clypensnentirelyn yellows ea. cecil ccvleled saree cles» pulchella 
3. Head small, narrower than the thorax; head and thorax hairy; 
mersenotum. entitely “black *..3, sacs. Foes ede dc we ela emarginata 
SeLeadeaSmiSitalssas! wAGe, aSn blot x snctas fete sie versieislarcialei cvelaleria st eioia totals. 6 4 
4. Size small, 9 mm.; mesonotum in greater part yellow; front 
and vertex with short, sparse hair; abdominal fasciae, ex- 
cepting the first, continuous anteriorly................. exigua 
4, Size larger, 12-15 mm.; mesonotum in greater part black; 
front and vertex clothed with long dense pubescence; ab- 
dominal fasciae deeply emarginate anteriorly........ pectifrons 
5. Median femora smooth beneath; second ventral segment flat, not 
tuberctiates: size: L213) “mimi, ic 4. ioe s wis ieee eee wate oe pectifrons 
5. Median femora serrate or carinate beneath, or broadly emarginate. 6 
6. Meso- and metapleura almost entirely yellow, truncation of 
metathorax with a yellow semicircular mark......... speciosa 
6. Meso- and metapleura with little if any yellow; truncation 
of metathorax without yellow markings.................. 7 
7. Second ventral segment flat, not tuberculate; pleura with short 
pubescence; a yellow crescent-shaped mark before anterior 
EUG Ree ere ins oe ale ere ek eer MARE BELO plana 
7. Second ventral segment bituberculate; pleura with long pubescence; 
front without a yellow mark before ocelli.......... emarginata 
Monedula speciosa Cresson. 
1865. Monedula speciosa Cresson, Proceedings of the Entomological 
Society of Philadelphia, iv, p. 470. 
1895. Monedula speciosa Fox, Proceedings of the Academy of Natural 
Sciences of Philadelphia, p. 366. ; 
Four females, Sidney, August, 1893 (L. Bruner) ; five males, 
McCook, July, 1906 (M. H. Swenk). I have two male specimens 
which have the second ventral segment bituberculate, and meta- 
notum without yellow marks. 
Monedula emarginata Cresson. 
1865. Monedula emarginata Cresson, Proceedings of the Entomological 
Society of Philadelphia, iv, p. 468. 
1895. Monedula emarginata Fox, Proceedings of the Academy of Nat- 
ural Sciences of Philadelphia, p. 368. 
Numerous specimens, from the northwestern corner of the state 
only. This species is easily recognized by the small head, which 
is much narrower than the thorax. 
383 
