336 APPENDIX. 



MONEDULA, Lair. 



1, M. A-fasciata. Black, obscurely iridescent; terguni 

 with four bands, interrupted and narrowed in the middle. 



Inhabits Pennsylvania. 



Jintennx with the basal joint beneath yellow; orbits 

 anteriorly, hypostoma and lahrum, yellow ; the latter mar- 

 gined each side with piceous, and the hypostoma has a 

 more or less dilated black spot above ; mandibles blackish- 

 piceous; thorax with a capillary line before; wings hya- 

 line, slightly fuliginous, nervures fuscous; metathorax at 

 tip each side compressed and yellow ; pleura with a whit- 

 ish spot over the anterior feet, and from one to three yel- 

 lowish approximate spots above the middle ; feet pale yel- 

 lowish; thighs black on the basal two-thirds, those of the 

 anterior feet black only on the exterior side; tergum with 

 four yellow bands, dilated on the sides, and gradually nar- 

 rowing to the middle of the back, where they are slightly 

 interrupted, the terminal one widely interrupted; two ter- 

 minal segments with large punctures each side and at base; 

 venter with three small yellow spots each side near the mid- 

 dle ; % with an obsolete spot each side on the two segments 

 beyond the bands, and the anus is three-spined, of which the 

 lateral ones are curved, and 9 with an obsolete, yellowish 

 line before the wings on each side. 



Length % three-fifths, 9 nearly seven-tenths of an inch. 



This species is in the collection of Mr. William W. 

 Wood. The hypostoma of the male specimen is occupied 

 by the black basal spot, excepting on its anterior margin. 

 The bands of the abdomen in this species are not at all 

 dentated. 



2. M. ventralis. Black, obscurely iridescent; tergum 



