MIT. 4 NEW PAEASITIC HYMENOPTERA GAHAN 27 



Omphalini and in the key to genera of that tribe runs out at Clos- 

 terocerus, a genus with which it has much in common but from which 

 it may be easily distinguished by the narrow and immaculate wings 

 with their long marginal cilia, by the noncompressed antennae, by 

 the swollen scape in the male, and by the differently shaped head. 

 Tn the swollen scape of the male, as well as in the number of antennal 

 joints and in other ways, it seems to agree very well with Ceranisus 

 Walker (which genus is placed in the Tetrastichini) but differs from 

 Walker's figure of C. -pacuvius Walker by the narrow wings, poorly 

 developed stigmal vein, 1 -jointed funicle, 4-jointed club, and the 

 more broadly concave occiput. For the present, at least, it seems 

 best placed in the tribe Omphalini. 



Female and male. — Head viewed from above strongly transverse, 

 the" occiput broadly concave and forming a sharp angle with the ver- 

 tex and temples; ocelli in a very low triangle; frons broad; antennae 

 inserted below the middle of head, about on a level with the ventral 

 eye margins; antennae 8-jointed (scape, pedicel, one very minute 

 ring-joint, one funicle joint and a 4-jointed club), the scape slender 

 and subfusiform in the female, enormously swollen in the male; pedi- 

 cel in both sexes large, distinctly longer than the funicle joint ; funi- 

 cle joint longer than broad; club fusiform, compact, but the sutures 

 distinct; pronotum concealed from above; mesonotum short, much 

 broader than long, with a very weak median groove, and the parap- 

 sidal grooves inconspicuous but apparently present; scutellum with- 

 out dorsal grooves; postscutellum conspicuous; propodeum short 

 without conspicuous folds or carinae, the spiracular grooves more or 

 less impressed; fore wings small and narrow with a long marginal 

 fringe, the marginal vein long, much longer than the snbmarginal, 

 the stigmal short and inconspicuous, postmarginal absent, venation 

 attaining to the apical quarter of wing; hind wing very narrow v.ith 

 the marginal fringe three or four times the wing breadth; tarsi 

 4-jointed; abdomen ovate, about as long as the thorax, with a very 

 short petiole, the ovipositor not at all exserted. 



DASYSCAPUS PARVIPENNIS. new species 



Plate 1, fig. 1. 



Female. ^Length 0.60 mm. Head, thorax, and abdomen smooth 

 and polished; antennal scape rather long, sKghtly thicker near base 

 than at apex ; pedicel equal in length to the ring joint and two fol- 

 lowing joints combined, distinctly thicker than the funicle; funicle 

 joint a little longer than broad; club 4-jointed, approximately as long 

 as the scape and as thick as the pedicel, the joints subequal in length, 

 the apical joint somewhat the longest and terminating in a short 

 spine; each of the flagellar joints set with several long bristles; mar- 

 ginal fringe of forewing fully twice as long as the width of wing. Head 



