ASHMEAD : CLASSII'ICATION OF THE (HALCIU I'LIES 239 



16. Tarsi 5-jointed 17 



Tarsi 3- or 4-jointed 31 



17. Apterous or with rudimentary wings 18 



Winged 34 



18. Antennfe inserted on the anterior margin of the head or far below its middle ; clypeus not extending 



to the middle of the inner margin of eyes 1 "J 



Antennae inserted on the middle of the face 30 



19. Head anteriorly with a large, deep, triangular fovea from which originate the antennrc 20 



Head anteriorly without such a fovea ; wings entirely absent, not represented by filaments 2.5 



20. Wings represented by two pairs of thread-like filaments 21 



Wings repre.sented by one pair of thread-like filaments or by bristles 22 



21 Head oblong, not or scarcely wider than the thorax, the eyes minute ; antennas separated by a sharp 



carina ; hind tarsi with the first joint dilated Philotrypesis Forster. 



Head large, oblong, .slightly narrowed anteriorly, the liiiid niarfjiii simuite, the hind angles rounded, 

 setose ; antennae 8- or 9-jointed with 1 ring-joint, the scape large, davate ; mandibles large, [lorrect, 

 curved, acute and entire at apex, but within, 3-dentate. 



Tetranemopteryx A.shmead, g. nov. {tyite Sycoseajder J,-Kelosa Westw.). 



22. Head oblong, the hind angles rounded, not acute 23 



Head oblong-quadrate, the hind angles acutely produced, not rounded 24 



23. Head large, oblong, broader than the thorax ; antenna; 10-joiuted, with 1 ring-joint inserted close 



together near the front margin of the head ; mandibles porrect, stout and curved, the tips acute, 



entire, the inner margin with a tooth behind the middle Sycoscapter Westwood 



(type iS'. insignis Westw.). 



Head oblong-quadrate, sinuate posteriorly ; antcnnte 8- or 'J-jointed, without a ring-joint, inserted close 



together near the mouth ; mandibles porrect, falcate, the tips bidentate, the inner margin with a 



tooth near the base Sycoscapteridea Ashmead, g. nov. (type Sycoscapter monilifer). 



24. Head oblong, the sides anteriorly nearly straight, the front angles rounded, the hind angles acutely 



produced ; antenna; 8-joiuted (or 9-jointed with 1 ring-joint), inserted close together near the mouth ; 

 mandibles small, falcate, entire; wings represented by short filaments. 



Sycoscapterella Ashmead, g. nov. (type Syam-aptcr anguliceps Westw.). 



25. AntenuiE shorter, at the most 9-jointed, the joints closely united, inserted further from each other than 



to the sides of the head, most frequently with only 4 or .') free joints 26 



Antennae longer, 10- or 11-jointed, with only the last three joints closely united, inserted near or not 

 far away from the mouth border -~ 



26. Head between the clypeus and the sides concave ; mandibles bidentate ; lal)iuni and paliii wanting, in 



place is a membranous tube; antenn;e conipose<l of 4 free joints, of which the thinl is small, 



annular, transparent and membranous Idarnes Walker. 



Head between the clypeus and side flat ; mandibles 3- or 4-dentate ; labium and labial palpi present, 

 the palpi 1-jointed ; tibiae short, closely and thickly spinous ; antennas with 4 or 5 free joints. 



Head depressed, wider than long, but not perfectly flat, more or less triangular, the angles 



rounded Trichaulus M:iyr. 



Head perfectly flat, longer than wide, trapezoidal ; mandibles broad, 4-dentato within ; 

 antennae .5-jointed, the scape flat, dilated towards apex Koebelea Ashmead. 



27. Hea<l more or less depressed ; tarei 5-jointed, the basal joint of hind tarsi often much compressed and 



with very long bristles. 



