25 
Dorsum of thorax and abdomen marked with yellow. 
Orbits, scutellum, and lobes of thorax more or less yellow; robust 
BI CCLOS ae es Scie s ecclesia ee eee 25. desmodioides Walsh. 
Same, with yellow transverse bands on abdomen, and venter altogether 
yellow sere fossis2 5: Be Re ae eee tesa hseee 26. sulphurea n, sp. 
Males. 
Antennz as long as or longer than the body of the insect. 
Cliwssvenyamunubel yaonvadle dase a. eatery =item eerie 5. agilis Cr. 
Clanyseconmsehyanovch eds sae = ae Sama tee see ese eis cmere ae 7. nevadensis Cr. 
Antenne not often exceeding one-half the body in length. 
Black species. 
Orbits black, rarely slightly rufous posteriorly. 
Pronotum black; stigma short, robust ..---....-..- 22. californica n. sp. 
Pronotum black; stigma elongate, narrow.......---- 13. kincaidi nu. sp. 
Pronotum with pale margins, 
Lateral walls of ocellar basin rounded or subobsolete. 
Third and fourth joints of antennw of equal length. 
Eimdtfemoranpales ssc ses) = 2-225 ss-- me 9. resinicola n. sp. 
Hind femora more orless dark...--...-...-:-- 2. parva Cr. 
imine sy ombslonocesteses-— +c ea a= ee 27. rugulosa n. sp. 
Lateral walls of ocellar basin sharply defined - -. -- 8. excavata n. sp. 
Orbits yellow; body black dorsally. 
Venter of abdomen, except centrally, black; vertex hairless, shining. 
14. pisum Walsh. 
Venter with vertex clothed with yellowish hairs. 25. desmodioides Walsh. 
Venter of abdomen altogether pale. 
Epimera black. 
Outer angles of pronotum pale ............-- 17. pomum Walsh. 
Pronotum altogether pale - 222-22. ==5-—- 2 --.- 4, pallicornis Nort. 
Epimera pale. 
Body robust. shiomaypaloes==—2e=—=—ss eee 12. robusta n. sp. 
Body elongate; stigma brown. 
Claws very minutely cleft at extreme tip. 28. placenta Nort. 
Claws coarsely, notehed\2:=2.5-2---5 2-2-1) 29. pallifrons Cr. 
Resinous; vertex, mesonotum, metanotum, and basal abdominal segments cen- 
hralllliva ac kee eres. Bh tere teen eee ets. o eieara seins ins clases 26. sulphwrea n. sp. 
Table of galls. 
Galls springing from lower side of leaf. 
Conicaltoripearshaped easse.asas soaeects cs Seer aiesa)e aay 30. pyriformis n. sp. 
Globular, attached minutely .....-...-.-...-- See a earn 14. pisum Walsh. 
Globular, broadly attached. 
Simehy, onelthersidet of midrib) -ss-e a2 sisee esos = ll 17. pomum Walsh. 
IMeLOw SON Ok NEAL mid Ti besces ales sess cas ee elelecioei sai et dl. monile n. sp. 
Galls bisecting leaf. 
Singly, or rarely more than two on leaf. 
Usually remote from Betole, averaging three-eighths inch long; on Salix 
LONG NOU Creme eis a a ozis aoe seas Yas cere ae oa Deepens ----- 15. bruneri n. sp. 
Near or joining petiole; averaging one-half inch long. 
Approaching shape of seed of Desmodium: 
Ong Sain COLPOTNICH TA sass assis eee estes sma e 22. californica n. sp. 
COM (SU GPNDONDUIS? See SEO Harries Seer 25. desmodioides Walsh. 
OMS OTs De heres ee ee et os ces oasis aetaieae ecicie 2. parva Cr. 
More robust, approaching globular..........--..-.----- 25. gracilis n. sp. 
