59 



will compare my hg-ure of Co/ias on Plate I, Fig. lo, with that of Meg- - 

 onostoma on Plate II, Fig. 4. he will see^that the outline of the prima- 

 ries is not the only character which allies Megonostoma to Go7iepteryx, 

 although the affinity to Colias as shown by the branching of all except- 

 ing the first of the sub-costal nervules of the primaries is certainly 

 greater; the neural differences from Colias are as follows: 



First sub-costal branch of primaries emitted considerably further 

 from anterior angle of cell, so as completely to alter the shape of the 

 cell; median branches almost equidistant at their origins; costal area 

 of secondaries broader and more rounded at base; angulation of lower 

 disco-cellular veinlet pretty nearly equal, so that the inferior angle of 

 the cell is less produced. 



Lastly, I do not think the pattern of the imago should be taken into 

 account at all; the Colias type of pattern occurs in other genera, and 

 in the case of Teracobis I can trace its gradual modification into a 

 totally different form closely resembling the orange-tipped butterflies 

 {Eiichloc Cardamines, and allies). 



NOTES ON MEXICAN LEPIDOPTERA, WITH DE- 

 SCRIPTIONS OF NEW SPECIES. 



Bv Henry Edwards. 



(Second Paper.) 



BOMBYCIDiE. 



Pericopis Schausii, n. sp. — ^Jet black, thorax with a few white 

 spots in front. Abdomen with the tip rosy red, and with white linear 

 bands beneath. Primaries with a red dot at the base near costa, and 

 an oblique sub-median band of bright lemon-yellow; terminating near 

 the internal angle. Behind this and near the apex is an oblique oblong 

 yellow spot followed on the middle of the margin by a small yellowish 

 white spot. Secondaries with a median band of white, oblique outwardly 

 and broken in the middle. Tibice and tarsi streaked with w^hite. Mark- 

 ings of wings repeated on under side, with the course of the nervules 

 at the base marked with white. i $ . 



Exp. wings 53 mm. Length of body 20 mm. 



Arctia eminens, n. sp. — Head cream-color on crown, black in 

 front. Thorax cream-color; collar with two large black spots; three 

 spots on disc, and the tegulae in the middle black. Abdomen black 

 above, with orange lateral stripe, below dull cream -color, with three 

 rows of small black spots. Pectus and fore tibiae dusky black ; middle 

 and hind tibice black with cream bands. Primaries black, with four 

 oblique macular bands of cream-color, the basal bent forward on costa 



