234 Mr. W. Schaus on 



As a result of tlie study of a large number of specimens, 

 especially a series from the La Plata received from the 

 Berlin Museum, I have reached the conclusion that J. macu- 

 lata and J. eigenmanni are merely varieties of J. lineata, 

 and that the species is extremely variable in the pattern of 

 its markings. 



In typical lineata there are narrow longitudinal stripes 

 along the series of scales ; in some specimens these may be 

 to a greater or less extent broken up into spots (fig. a). 

 Numerous examples approximating to the typical form in tlie 

 collection of the Natural History Museum are from the Rio 

 Grande do Sul, the La Plata, Naposta Grande, and Tala, 

 Salta, Argentina. In the variety maculata (fig. V) the 

 spots are larger and fewer, but there is no sharp line of 

 demarcation from lineata. 



A series of examples from the La Plata, received from the 

 Berlin j\luseum, includes some tj'pical maculata and others 

 with the spots still larger and fewer ; some of these have 

 the spots mostly rounded or ovate, in some they are ex- 

 panded longitudinally and in others vertically. Two of the 

 extreme forms are figured : one (fig. c) bears a close resem- 

 blance to Haseman's J. eigenmanni ; the other (fig. d) leads 

 towards the barred variety figured below it (fig. e), one of 

 three nearly similar specimens from Oaiza, Bolivian Chaco 

 {Coll. Borelli). 



XXIV. — New Species of Heterocera from Costa Rica. — XX. 

 By W. Schaus, F.Z.S. 



Thyrididae- 

 Macrogonia major^ sp. n. 



$ . Palpi purple-brown, the second joint shaded below 

 with grey and fuscous. Head, collar, and thorax yellow- 

 roseate. Fore wings yellowish, thickly reticulated with 

 roseate ; costa with numerous dark spots to near middle, 

 then with widely separated black streaks along extreme edge; 

 a fine black line from middle of inner margin to near apex ; 

 a faint brownish basal line ; a similar sinuous antemedial 

 line ; an indistinct annular line at end of cell ; some mar- 

 ginal black reticulations. Hind wings deep roseate ; a 

 black medial line ; a fainter postraedial line j some terminal 

 fine dark reticulations ; cilia on both wings dark red, tipped 



