14 Annals Entomological Society oj America [Vol. XII, 



whether the apical part of the antenna ("club") consists of one, 

 two or three separate joints, descriptions without figures may 

 be misleading on this point. The species bred by Dr. Tillyard 

 from Myrmecia differs considerably from P. fraudnlentus 

 in both the adult and pupa and as they occur with such different 

 ants they may quite likely prove to be generically distinct. 

 In accordance with the large size of Myrmecia, it is more than 

 twice the size of the Abyssinian parasite of Pheidole and by 

 reason of its striking color pattern may be very readily recog- 

 nized. 



Psilogaster fasciiventris sp. nov. 



Imago. (Plate I, Fig. 2). 9 Length 7.5 mm. Head 

 and thorax greenish bronze, less greenish and with purple 

 reflections on the propodeum; abdomen piceous, with trans- 

 verse yellowish bands, orange yellow on the second segment 

 and lighter yellow on the following segments; band of second 

 segment narrowly interrupted on the median line and curving 

 forward on the sides to near the apex of the petiole, separated 

 by its own width from the apical margin of the segment; those 

 of the following segments of similar form, but not interrupted 

 medially, that of the fifth widened medially and angularly 

 extended forward; petiole black with a purple cast; antennas 

 ferruginous, scape lighter; mandibles light brown; cox^ black, 

 the front ones bronzed; femora fulvous; tibiae and tarsi pale 

 yellow, last tarsal joint black at apex; wings hyaline at base, 

 brown elsewhere, more deeply so anteriorly near the middle. 

 Head much narrower than the thorax, fully three times as broad 

 as thick; posterior margin slightly concave; face below the 

 antennae transversely striate, the striae continuing over the 

 cheeks and upward behind the eyes and across the occiput; 

 occipital margin raised; ocelli in a nearly straight Hne, the 

 posterior ones nearly as far from one another as from the eye- 

 margin; antennal basin transversely striated; eyes bare; malar 

 space nearly as long as the eye; antennas 11-jointed, scape 

 twice as long as thick; pedicel very short; first flagellar joint 

 as long as the scape and pedicel together, over three times as 

 long as broad; following joints growing shorter, the seventh 

 and eighth less than twice as long as thick; apical one longer. 

 Thorax above coarsely rugose-reticulate; parapsidal grooves 

 impressed only on posterior half; scutellum without distinct 



