OF WASHINGTON, VOLUME XVIII, 1916 127 



17. More depressed, unicolorous. (Quebec) Cassida rubiginosa 



More convex, sutural and scutellar region fuscous. (Texas) 



Cassida panzeri (?) 



18. Elytra with sutural and two lateral black vittae . . . . Cassida bivittata 

 Elytra not vittate 19 



19. Depressed, pale, coarsely punctate Gratiana pallidula 



Convex, maculate or golden, punctures usually fine 20 



20. Antennal joints 2, 3 and 4 lying at rest in groove whose outer edge is 



produced into a sharp carina, 3rd joint twice as long as 2nd 21 



No antennal groove, joint 3 but slightly longer than 2nd 22 



21. Elytral margin black or clouded at humerus, elytra usually macu- 



late Chirida guttata 



Elytral margin translucent at humerus, elytra usually immaculate 

 (Tropical) Chirida exlensa 



22. Elytra gibbous, rugose and irregularly reticulate Deloyala clavala 



Elytra smooth, evenly convex 23 



23. Elyeral margin entirely translucent Metriona bi.colorf 



Elytral margin clouded opposite humeri 24 



24. Transparent lateral area of expanded margin bordered internally with 



narrow black band. (Arizona) Metriona emarginata 



No black markings 25 



25. Outline nearly circular, opaque part of elytra darker at sides, size 



larger Metriona purpurata 



Outline more elongate, color uniform, size smaller. (Arizona) 



Metriona profligata 



26. Outline nearly circular, disc with large black ring containing three 



minute black points on yellow ground. (Tropical) 



Ctenochira bonvouloiri 



The following has been accepted for publication: 



SOME AMERICAN HYMENOPTERA. 



BY J. C. CRAWFORD. 

 Alcidamea colei, n. sp. 



Male. Length about 5 mm. Black; head and thorax clothed with 

 dense white pubescence; head closely strongly punctured, punctures sepa- 

 rated by about a puncture width; on mesonotum the punctures similar, 

 closer laterally and slightly sparser in middle; antennae short, brown, 

 flagellar joints subquadrate, first slightly longer than broad, last slightly 

 longer than first; wings almost hyaline, first and second cubital cells along 

 radius subequal in length; legs dark brown, tarsi more reddish, pubes- 

 cence on legs sparse, white; abdomen black, shiny, the apical margins 

 broadly testaceous, margin of 6th segment including lateral teeth, almost 

 colorless; segments 1-5 with apical bands of appressed white pubescence; 

 7th dorsal segment pointed at apex the produced portion hardly as long 



