New species of Orasema (Hymenoptera: Eucharitidae) from Central and South America Heraty, John M. Baker, Austin J. Journal of Natural History 2020 2020-09-23 54 9 735 754 63G2F 266171 Cameron 1884 [160,364,410,436] Insecta Eucharitidae Orasema Animalia Hymenoptera 3 737 Arthropoda genus   Diagnosis Recognised from all other species of  Orasemaby having a combination of 8 funiculars in males and females ( Figure 2), the labrum with 4 –12 digits (usually>6), mesothorax dorsally scabrous or coarse rugose, fore wing with a setose costal cell, speculum bare, and basal third of hind wing with scattered microsetae, otherwise pilose. Other features include the yellow scape, yellowish-brown mandibles with a darker brown margin, propodeal callus with 2 –3 minute setae, wings hyaline, postmarginal vein not more than 2.3× as long as stigmal vein, fore wing with basal area bare, petiole cylindrical and rugose, lateral margins of petiole rounded (not carinate), 2.1 –3.8× as long as broad in females, 8.3 –10× as long as broad in males, and smooth antecostal sulcus.   Key In the Burks et al. (2018)species group key, this species group keys to ‘[undescribed set of Neotropical species] ’in the  Orasema festivacouplet with more than 6 digits, although we now recognise that some specimens have as few as 4 digits. All  festivagroup species have a lateral carina on the petiole, which is absent in the  lasalleigroup.   Diversity We recognise four species in the group,  Orasema janzeni( Costa Ricaand Nicaragua),  O. lasallei( Costa Rica, Honduras, Mexico, Nicaragua),  O. peckorum( Brazil), and  O. vasquezi( Colombia).   Biology.  Orasema lasalleiwas taken from a nest of  Pheidole vorax(Fabr.) (Myrmicinae).   Key to species of the  O. lasalleispecies group     1. Frons vertically costate, lower face mostly smooth ( Figure 3a, 4e); labrum with 6 –12 digits ( Figure 3a,b) ................................................................................................................................... 2  Frons rugulose or reticulate, lower face with some sculpture ( Figure 3f); labrum with 4 –8 digits ( Figure 3 f).............................................................................................................................. 3   2. Hind femur yellow ( Figure 3c, d)............................ ............................  Orasema lasallei  sp. nov.  Hind femur dark brown medially ( Figure 4d) ............................  Orasema vasquezi  sp. nov.   3. Labrum with 8 ( ♀) or 6 ( ♂) digits; frons rugulose-reticulate; basal area of speculum bare; postmarginal vein 2.2× as long as stigmal vein ....................  Orasema peckorum  sp. nov.  Labrum with 4 –6 digits; frons finely reticulate; basal area of speculum closed by broad band of setae; postmarginal vein 1.4 –2.2× as long as stigmal vein.......................................... ..........................................................................................................................  Orasema janzeni  sp. nov.