44 NEUROPTERA OF NORTH AMERICA. 



Hah. Mexico ; Matamoras, Tamaulipas. Common. 



I have seen many specimens, but all of them in alcohol and 

 mutilated, and the colors were probably a little changed. 



I have had a large species from New Grenada in alcohol, but 

 the specimen is very much damaged. 



BAETIS Leach, 

 Abdomen furnished with two setis ; wings four, transverse veins 

 numerous ; eyes simple ; in the male approximate, large. 



1. B. Interpunctata ! 



Baetis interpunctata Say, Jour. Acad. Philad. VIII, 41, 1. Walker, 

 Catal. 562, 23. 



Yellowish white tinged with green ; head yellowish, vertex with 

 a lateral black point, front with an arcuated black line ; ocelli with 

 a black ring around each, apex of the antennae black ; pi-othorax 

 with a black line each side : mesothorax tinged with brown ; feet 

 greenish, the four anterior femora with a black ring upon the mid- 

 dle and apex, apex of the posterior ones fuscous ; abdomen with 

 the apex ferruginous, the posterior margin of the dorsal segments 

 black ; set® pale ; wings hyaline, the anterior margin greenish, the 

 transverse veins black, an abbreviated, submarginal, medial black 

 line. Imago and subimago, male and female. 



Length of body 8 millim. Alar exanse 18 — 26 millim. Setae 

 ^ 20, 9 14. 



Hah. Indiana (Say) ; Washington, Trenton Falls (Osten Sac- 

 ken) ; Chicago, Alleghany Mountains, Va. (Osten Sacken). 



2. B. flaveola ! 



Baetis flaveola Pict. Ephem. 186, 12, tab. xxiii, fig. 4. Walker ! 

 Catal. 559, 12. 



Yellow, eyes black ; wings yellowish-hyaline, transverse veins 

 black ; posterior femora with a black point ; abdominal segments 

 margined with black ; set® yellowish. (From the figure and de- 

 scription of Pictet. (Female imago.) 



Length of body 8 millim. Alar expanse 22 millim. Setae 9 

 millim. 



Hah. Tennessee (Pceppig, Museum of Vienna) ; St. Martin's 

 Falls, Albany River, Hudson's Bay (Barnston). 



