436 PRGCEEDrNGS OF THE NATIONAL MUSEUM. vol. 55. 



(as in inaculata (pi. 42, fig. 2)), reticulately lineolate with shallow, 

 irregularly placed, indefinite punctures (as in captiva) or ruglose 

 (as in tritici (pi. 42, fig. 1)). This excludes all species having the 

 carinate occiput or an even, distinct, umbilicate punctation on the 

 praescutum and other portions of the thorax, even though the puncta- 

 tion be faint. The genus thus restricted excludes Howard's species, 

 hageni.^ hromi^ and calif ornicum^ and Ashmead's dbnorme^ montanum., 

 and nevadense., all of which belong to the Eurytomines. The senior 

 writer has examined the types of these excluded species. Nothing is 

 known of their life history. 



GLCSSARY. 



A'nnulations=^lL\xe rings or elevations on the distal extremity of tlie flagellar 



joints of the antennae of some males (pi. 47, figs. 1, 7, 8). 

 G'rooj;e=Tlie longitudinal, margined depression or groove down the center of 



the propodeum (pi. 43, fig. 3). 

 Sinracular carina e=The carinae that curve around from the groove or from 



near the center of the propodeum to the spiracles (pi. 43, fig. 2). 



TABLE 1. FEMALES. 



1. Pi'aescutum smoothly reticulate, brownish 2. 



Praescutum reticulately lineolate, black 3, 



Praescutum rugulose 13. 



2. Wingless and small ; mesothorax slightly longer than prothorax. 



grandis form ininuta Riley. 

 Winged and large ; mesothorax twice as long as prothorax. 



grandis form grandis Riley. 



3. Propodeum without distinct, continuous, margined groove ; occasionally 



alhomaculata has a margined groove 4 



Propodeum with a distinct margined groove 6 



4. Abdomen distinctly shorter than thorax agrostidis Howard. 



Abdomen longer than thorax 5 



5. Propodeum rugose, generally with a central longitudinal carina; abdominal 



segments 5 and 6 each distinctly longer than either 3 or 4; species 



large websteri Howard. 



Propodeum usually granulose ; abdominal segments 5 and 6 each same 

 length as 3 and 4 ; species small alhomaculata Ashmead. 



6. Pronotal spots small to minute 7. 



Pronotal spots medium to large, occupying about one-half anterior dorsal 



margin of prothoi'ax 8. 



7. Pronotal spots plainly visible from above; first funicle joint phis ring joint 



only slightly longer than pedicel; abdomen longer than thorax; greatest 



vertical diameter of the abdomen at third segment captiva Howard. 



Pronotal spots scjircely visible ; first funicle joint plus ring joint distinctly 

 longer than pedicel ; greatest vertical diameter of the abdomen often at 

 fifth segment ; abdomen shorter than thorax poae, new species. 



8. Groove broad, usually wider posteriorly 9. 



Groove narrow, marginal carinae of groove parallel 10. 



9. Rugose within and laterad of the groove; first funicle joint almost twice as 



long as pedicel ; praescutum with numerous broad, shallow impres- 

 sions dactylicola, new species. 



Rugose within and usually granulose laterad of the groove; first funicle 

 joint only slightly longer than pedicel; praescutum without (rarely with) 

 broad, shallow impressions alhomaculata Ashmead. 



