74 ANTHRAX MELASOMA. 



tellum almost wholly testaceous , only with a black spot 

 at the base (Wiedemann describes it as black with a tawny 

 tip) ; furthermore the third posterior cell is not divided by 

 a cross-vein as Wiedemann has figured it , but there is 

 only at the curvation of the discoidal cell a short super- 

 numerary vein, running almost in the same direction as 

 the basal part of the longitudinal vein between the second 

 and third posterior cell. According to Osten Sacken the 

 third posterior cell in this species is not always completely 

 bisected by a cross-vein, though it is the case in the ma- 

 jority of the individuals. Finally none of the other North- 

 American species of the group to which A. Halcyon be- 

 longs {A. Ceyx Low , Demogorgon Walk., /iaviceps Low , 

 fuliginosa Low, Alpha 0. Sack.) can here be taken into 

 consideration. Most of all it reminds one of A. Alpha 0. 

 Sack., but there the second submarginal cell is divided near 

 its base in two parts by a small cross-vein , which does 

 not exist in the above mentioned specimens. 



2. Anthrax melasoma, n. sp. 



Tota atra opaca ; facie subprominente ; antennarum arti- 

 culo tertio coniformi , stylo breviusculo ; alis cinereis , basi , 

 costa fasciaque lata nigro-fuscis. — 9 Long. 13.5 mm. 



The specimen of which the pubescence is somewhat rub- 

 bed off is deep black and almost opaque, the scutellura 

 more piceous. The front and face as well as the sides of 

 the thorax and abdomen are clothed with black hairs; on 

 the anterior part of the thorax and on the occiput there are 

 remains of an erect dense grayish-yellow pubescence. In the 

 middle of the front is a small impression ; the face is a little 

 prominent ; the proboscis hardly reaches beyond the oral mar- 

 gin. Antennae black; the first joint beset with black hairs ; 

 the third joint oblong-conical, with a short style a little 

 thickened at the end. Legs black, slender ; hind tibiae with 

 fine spines. Wings broad ; their base and a broad crossband 

 which anteriorly coalesces with it , blackish brown ; the dark 



Notes trom the Leyden Museum , Vol. IV. 



