ASHMEAD : CLASSIFICATION OF THE CHALCID FLIES 339 



the records conflict, Diptera are usually associated with the Coleoptera and Lepi- 

 doptera, either as parasites or living together in the same plant. In breeding para- 

 sites one cannot always ascertain, with absolute certainty, the host of the parasites. 

 Species belonging to the genus AsticJuu Forster are bred from fungi infested with 

 dipterous and coleopterous larvse-. 



TABLE OF GENEEA. 



1. Females 2 



Males 11 



2. Antennae 10-jointed, with one liug-joint (scape, pedicel, a ring-joint, a 4-jointed funicle and a 3-jointed 



club) 3 



Antennae 9-jointed, with one ring-joint, or less than 9-jointed 9 



3. Wings hyaline, immaculate 4 



Wings banded or maculate with fuscous. 



Antennae very long, the flagellum subclavate ; abdomen conically pointed ; postmarginal vein 

 short, the knob of the stigmal vein petiolate...Asticlius Forster (type A. arithmetricus Forst.). 



4. Abdomen long, conically produced, as long or longer than the head and thorax united 5 



Abdomen short, ovate or cordate and usually shorter than the thorax, never much longer 8 



5. Metanotum short, without carina or at the most with only a trace of a median carina 6 



Metanotum long, distinctly tricarinate, the surface punctulate or rugulose. 



Flagellum stout, subclavate, finely pubescent ; abdomen not longer than the head and thorax 

 united or only a little longer Selitriclius Koudani. 



6. Metanotum smooth, impunctate 7 



Metanotum punctate or sculptured. 



Wings almost glabrous, the short pubescence arranged in hair lines, usually conforming to the 

 spurious veins ; postmarginal vein well developed Secodes Forster. 



7. Front wings well pubescent ; postmarginal vein well developed, long. 



Eyes not large, the malar space distinct ; scape of antennae metallic or metallic except at base. 



Euderus Haliday (type Entedon amplus Walk.). 

 Eyes very large, pubescent, occupying the whole side of the head and extending to the base of 

 the mandibles, the malar space wanting ; scape very slender, white. 



Euophthalmoniyia Ashmead, g. nov. (type E. pallidipes Ashm.). 

 Front wings almost glabrous, not well pubescent, the pubescence arranged in more or less irregular 

 hair-lines, as in Secodes ; postmarginal vein not well developed, not or scarcely longer than the very 

 short subsessile stigmal vein ; eyes normal, the malar space distinct. ^ 



Omphale Haliday (type 0. salicis Hal.). 



8. Wings bare or nearly, the stigmal vein rather long, the postmarginal vein not developed. 



Flagellum subclavate, not long, the pedicel long, obconical, the funicle 4-jointed, joints 3 and 

 4 wider than long ; head lenticular, wider than the thorax ; parapsidal furrows sharply defined 

 postei'iorly, wanting at anterior third ; metathorax short, punctate, with a median carina ; 

 abdomen short cordate Hubbardiella Ashmead, g. nov. (type H. arizonensis Ashm.). 



9. Antennae 8-jointed with a ring-joint 10 



Antennae 9-jointed, with a I'ing-joint, the funicle 3-jointed, the club 3-jointed, the terminal joint 



usually represented by a spur ; wings immaculate, or at most with a substigmal fascia ; meta- 

 thorax smooth, without a median carina or lateral folds, but with spiracular sulci ; abdomen not or 

 scarcely longer than the head and thorax united. 



