10 
Lt 
12 
ISCHNURA  94a7 
2. Females 
Prothorax with no teeth or tooth like processes.............. 2. 
Prothorax with at least a tooth like process on the hind lobe. . . 12. 
Size large, length of abdomen over 21 mm................... a 
Size smaller, length of abdomen under 20 mm................ 8. 
Hing wings under. 14, mim, inilength.... 2. cs: 356% es wat ee 4, 
Lind wing-OVver [9 mm. IM lenetn, 2 has. Leo... i. ee OE 5. 
Abdominal segment 9 black on dorsum......... ramburii, p. 350 
Abdominal segment 9 with at least some blue on dorsum...... 
Sy Mien dtp kis) Sil Ra de OR eA Raa credula, p. 353 
With a spine on the apical margin of the sternum of abdominal 
SORIMNEUE Ber cep tarsal. Phadt aril p hia packed avant Be 6. 
WikthoutmuehtarspineonS. sone c.ed uss ee da oh ae ra 
Mz rising nearest the 5th postnodal cross vein in the front wing. 
Species East of the Mississippi.............. kellicotti, p. 351 
Mz rising nearest the 4th postnodal cross vein in the fore wings, 
Species west of the Mississippi................ barberi, p. 352 
M. arising nearest the 6th postnodal. Species west of the Missis- 
SSE ER ee a hea Oe Fa i be GA aug erratica, p. 354 
Me rising nearest the 5th postnodal. Species east of the Mississippi. 
(Aviomalura,“Wennedy) <0 oo Si rseis sos Sok prognatha, p. 349 
Hind margin of the prothorax convex throughout, with a small 
TM CCIAT MOLEC Beare so tai a he ke). en ae demorsa, p. 352 
Hind margin of the prothorax high, sides straight and convergant, 
convex: mediallyine noteh>i2 Soave 90s. Hae esd 9. 
Pale antehumeral stripe entire. ;..-...0c. oss oso asso oss 10. 
Pale antehumeral stripe usually interrupted to appear as an in- 
verted exclamation mark. Abdominal segment 8 without a 
ventral spine. Eastern species................. posita, p. 350 
Abdominal segment 8 without a spine on the apical margin of 
SETI «fh iF iio andes PRR Re ek eh ee hee nip is 
Abdominal segment 8 with a ventral spine on ened margin. Dis- 
tribution east ot Texas’. 3.05 0. ca os a verticalis, p. 355 
Species west of the Mississippi................ perparva, p. 353 
Species east of the Mississippi................... posita, p. 350 
Middle prothoracic lobe with a small tooth on each side. (Celae- 
Mura; IKONNEGY icc. 55 ons che cee ey Sattler, Sue eee 13. 
Middle prothoracic lobe without teeth. Hind prothoracic lobe 
with a median truncate tooth-like process, with a pencil of erect 
Hairs-On Ci Men SIGE. | eee ans antes cervula, p. 353 
