ASHMEAD : CLASSIFICATION OF THE CHALCID FLIES 291 



45. Hind tibiae not compressed 48 



Hind tibiae compressed. 



Pedicel not small, obconical, larger than the first joint of the flagellum. ? genus 



46. Eyes pubescent Macreupelmus Ashmead. 



47. Postmarginal vein long, twice or nearly twice as long as the stigmal vein ; scape short ; flagellum fil- 



iform, clothed with a dense pubescence ; pedicel minute. 



Joints 1-7 of funicle always longer than thick, the club-joints not very long. 



Cerambycobius Ashmead. 

 Joints of funicle very short, thicker than long, the club-joints usually very long. 



Anastatus Motschulsky. 



48. Hind tibiae somewhat compressed. 



Pedicel obconic, smaller than the first joint of the funicle, the joints of the flagellum, except some- 

 times 6 and 7, longer than thick ; dorsal abdominal segments not incised medially at apex. 



Arachnophaga Ashmead. 



Tribe II. Tanaostigmini. 

 This little group is allied to the subfamily Encyrtinx, in which group Dr. How- 

 ard first placed his genus Tanaostigma, and also to the family Cleonymidse, where, 

 deceived by a male specimen, I first placed the genus EutricJiosoma. Additional 

 specimens, and the discovery of two new genera have enabled me to see more clearly 

 the affinities and relationship of the group to other chalcidids, and I believe other 

 discoveries will confirm my views in assigning it a position with the Eupelminse 

 rather than with the Encyrtinse. 



TABLE OF GENERA. 



1 . Female 2 



Males 5 



2. Scape of antennae slender, not at all dilated * 



Scape of antennae broadly dilated beneath, or dilated, or compressed its entire length. 



Scape compressed or dilated its entire length ^ 



Scape broadly dilated beneath ; flagellum flattened, the joints of the funicle subpedunculate 

 and much wider than long ; postmarginal vein shorter than the stigmal, the latter long ; 

 postmarginal vein shorter than the stigmal, the latter long, nearly perpendicular with the 

 front margin ; abdomen not longer than the thorax, the ovipositor slightly exserted. 



Tanaostigma Howard (type T. coursetise Howard). 



3. Flagellum subclavate, the joints of the funicle cylindrical, a little longer than thick ; postmarginal vein 



about as long as the stigmal vein, the latter not short ; body bare ; abdomen as long as or a little longer 



than the head and thorax united Tanaostigmodes Ashmead (type T. howardii Ashm.). 



Flagellum subcompressed, the funicle joints, or at least 1 to 3, wider than long ; body well clothed with 

 short, scale-like white hairs ; abdomen subglobose, scarcely as long as the thorax, the ovipositor 

 subexserted Trichencyrtus Ashmead, gen. nov. (type T. chapadss Ashm.). 



4. Body clothed with short scale-like white hairs ; scape very slender, the flagellum stout, pubescent, the 



joints wider than long ; wings glabrous, the stigmal vein ending in a knob, slightly curved and as long 



as the marginal vein, the postmarginal vein wanting Eutrichosoma Ashmead 



(type E. mirabile Ashm.). 



