30() APPENDIX. 



Like the cayennensisy Fabr. this species has a white spot 

 on each wing, but the clavum of the antennae is not trun- 

 cated. The eyes are each bisected by an impressed line in 

 the middle, as in the maculatus, Oliv. and all others of 

 this genus. This species was found by Mr. William W. 

 Wood. 



HEMEROBIUS, Latr. Lam. 



1 . H. irroratus. Blackish ; thorax with three lines and 

 lateral margin yellowish ; wings hyaline with black spots. 



Inhabits United States. 



Body hairy ; antennse fuscous, less than half the length 

 of the body, filiform ; orbits above and before, and hypos- 

 toma glabrous, white, the latter with a broad, transverse, 

 brownish line near the tip ; labrum white, with two ob- 

 solete, dusky, longitudinal spots ; maxillary palpi black ; a 

 large, transverse, quadrate, black, glabrous spot, surround- 

 ing the base of the antennse ; thorax, anterior segment five- 

 lined, lines equal ;yee^ whitish, hairy, four anterior thighs 

 annulate with brown near the tip, their tibia at tip and an- 

 nulus near the base, brown ; pleura, incisures whitish ; 

 ■wings hyaline, with numerous irregular, unequal, black 

 and white points and spots, which are larger on the inner 

 and outer margin ; nervures and margins alternately spot- 

 ted with blackish and white ; nervures of the disk with only 

 a single line of connecting nervures which pass across the 

 middle ; margin with numerous nervures ; inferior wings 

 without spots, excepting on the margin. 



Length to tip of the wings one inch and a quarter. 



Rather rare in Pennsylvania. We obtained a specimen 

 in the North-west Territory, and Mr. Isaiah Lukens in- 

 formed me that they are extremely numerous near Lake 

 Erie in June. 



