18 INSECUTOR INSCITI^ MENSTRUUS 



yellowish, without marks ; a broad blackish shade at middle of 

 wing from costa to yellowish area; discal dots conjoined, dark, 

 in a diffused darker area; outer line near margin, double, 

 blackish, the inner line crenulate, the outer straight and dif- 

 fused. Hind wing subhyaline whitish, with gray costa and 

 terminal line. Expanse, 29 mm. 



Types, male and female, No. 34981, U. S. Nat. Mus.; La 

 Rioja, Argentina, February 16 and March 25, 1921, from larvae 

 in flower and stem of Cerus validus (W. B. Alexander). 



Family NOLID^ 



Roeselia caruscula, new species. 



Fore wing white, with a raised triangular gray tuft at middle 

 of costa, edged with black within; from this a wavy black 

 median line crosses the wing; inner line invisible, outer curved 

 over cell, punctiform; subterminal line shaded, gray, wavy. 

 Hind wing with gray discal dot, the termen a little dusky. 

 Expanse, 12 mm. 



Type, female, No. 24946, U. S. Nat. Mus.; Mirador, Mexico, 

 June, 1921 (R. Miiller). 



Near R. patina Druce, smaller, the lines paler, the hind 

 wing without gray shading. 



NOTE ON THE MALE GENITALIA OF CULEX 

 CORONATOR AND ALLIED FORMS 



(Diptera, Culicidce) 



By HARRISON G. DYAR 



In the forms here noticed, the mesosomal structures of the 

 male genitalia are identical. Variation occurs in the setae of 

 the lobe of the side-piece and the apex. 



Culex coronator Dyar & Knab. 



The structure of the side-piece is shown in Plate I, figure 1. 

 The three normal rods are present, but the outer part bears no 

 leaf, is slightly detached and carries about six setae. 



