STONYX. 95 



above, ante p. 81, the introduction to the genus Eocoprosopa.) Moreover, the character 

 of the colouring and hairy covering of the two species of Litorhynchus, described by 

 Macquart, is quite different from those of Stonyx. 



1. Stonyx clotho, <j $ . (Tab. II. fig. 2.) 



Anthrax clotho, Wiedem. Aussereur. zweifl. Ins. ii. p. 635. 

 Hab. Mexico, Orizaba, Tuxpango (Sumichrast). 



I reproduce Wiedemann's description, which is quite recognizable; the state of 

 preservation of the specimens before me does not enable me to prepare a more complete 



one : — 



" Nigra ; alis nigris, excisura magna marginis interni, duobus punctis notata, altera 

 minore apicis maculaque ad marginem externum limpidis. Long. corp. 7 millim. 



"Antennae black, third joint globose, with a setiform style; proboscis rather long, 

 projecting. Face in part rufous. Front with a rufous cross-band in the middle. 

 Thorax black, with black pile, a rufous collar, but with black hairs above it. Abdomen 

 with a brownish appressed pubescence and black hairs, which form distinct tufts on the 

 sides ; I do not perceive any white spots. Wings brownish-black, on the distal half of 

 the posterior margin a broad, triangular hyaline excision, marked with two distinct 

 black dots ; in front of this excision, near the anterior margin, there is a large hyaline 

 spot, which touches the end of the costal cell ; a narrow brown band separates this spot 

 from the hyaline excision ; immediately behind the hyaline spot there is a rounded spot 

 of darker, blackish hue, which covers the bifurcation of the third vein ; beyond the 

 large excision there is a smaller one, truncate at the tip, which occupies the posterior 

 margin before the apex ; several small hyaline drops in the brown near the apex ; in 

 the dark portions of the proximal half of the wing some small, pale yellowish marks.— 

 Mexico (Berlin Museum)." 



I have seven ( 6 $ ) specimens before me measuring 7-11 millim., all from Prof. 

 Bellardi's collection. The pattern of the wings is variable ; sometimes there is a brown 

 spot on the bifurcation of the second vein ; the hyaline drops in the brown near the 

 apex are very inconstant in their number and position ; the intensity of the darker 

 portions of the brown is also variable. 



2. Stonyx clelia, sp. n., c? 2 . (Tab. II. fig. 3.) 



Head brown, face and cheeks more reddish ; the face and anterior part of the front covered with rufous 

 (almost copper-coloured) scales; the short erect pile on the front a little longer and more dense on its 

 middle portion, where the ground-colour is black ; vertex dark, greyish-pollinose on both sides of the ocelli. 

 Third antennal joint broader than long, short bulbiform, the style 4-5 times longer than the joint, 

 with a minute bristle at the tip. The brown thorax densely beset in front, on the sides and below, with 

 long brownish-rufous hair, between which, on the humeri, some black hairs are visible; a paler tuft 

 under the insertion of the wings; the disc of the mesonotum and the scutellum covered with scattered, 

 appressed, scale-like, rufous copper-coloured hairs, among which a delicate pubescence of erect black pile is 



