122 Bulletin Wisconsin, Natural History Society- [Vol. 9, No. 3. 



There can be little question of the identity of semiaquea Bur- 

 meitser (nee Auctorum) and complanata Rambur. Calvert 

 (Trans. Am. Ent. Soc., 25, pp. 27-104, 1898; pi. 1) in his notes 

 on the types of Burmeister has published the following (p. 88) : 



2 (type). No T-spot or other black spot on the frons. Front 

 wings unspotted. Hind wings with brown extending along the 

 costal margin from base to nodus, thence obliquely towards the 

 anal angle, the outer margin of the brown being very irregular 

 as the central parts of the cells there are clear ; the median, sub- 

 median and hypertrigonal spaces, the areas between the sectors of 

 the arculus and above the upper sector of the arculus out to the 

 level of the apex (distal angle) of the triangle are clear. 



In his notes made of Rambur's types in the de Selys collec- 

 tions at Brussel, Dr. Ris has written as follows : 



Hindwing: brown basal spot in C and S to the nodus, in an 

 oblique line to three cells distally from the end of the anal tri- 

 angle ; the margins of the markings lacerate by the color being 

 reduced to vein borders ; central clearings of cells especially in 

 m. (The specimen referred to is the male type of Rambur). 



(Of the female type) Hindwing: brownish spot to nodus 

 and on the anal margin to end of anal loop. Between M3 and 

 M4 some brown cells distally of an oblique line between those 

 two points. Very many clear centers of cells. 



Tetragoneuria williamsoni sp. nov. 



Colors olive, yellow, black and brown. 



$ . — Labrnm and frons rich yellow, face with olive band in middle ; 

 vertex olive, frons with a black T-spot. Pile and frons and vertex 

 black, otherwise pale. Antennae black. 



Thorax brown, irregular lateral stripes black, shining in places, 

 but not metallic. Irregular yellow spots enclosed by the stripes. Pile 

 gray, somewhat mixed with brown on the sides. 



Fore wings without color. Hind wings hyaline, membranule 

 fumose. A streak of brown in the costal space and sub-costal space 

 to half-way to the first antenodal. First antenodal with small spot 

 at intersection. Lower half of anal triangle margined with brown. 



