MONOGRAPH OF THE NORTH AMKIilCAN I'KOL'TOTKYFH^.K. .lOf) 



U. Heatl :iii(l tliorux puliHla-il. 



Ant«*tiii:i- iiiid lc;;s lil.irk, inMliri-l ;iln)iif .-is liHijj !ih tlm liiNt ami hccoikI (niiiclar 

 JoiiilH iiuitt'tl. |>al(' at ti|i. llitt liiHt Hiiiall, tlio hicoimI u litlli- ciirvnl, 

 club li-joiiitt^d, tlio ji»iiitH, fxi-i>|it, tlxf l.-ittt, a litllo Ioiik**)' tliaii tliick, 

 tli<* lattt (uuu-HliaiHjtl, uiiu-tliinl lur^vr tlian tlm peimlliiiiati-. 



1'. ( Ol.UltAUKXMH, 



Aulfiiiia- autl lo^H riitb-piccouH. 



i'lMliccl not aH lon^ as tliu tirat and sorond t'nniilai' Joints nnit<<l, tlicHccond 

 larj^i', dilat«Ml, mivtd, tlui Joints of «liil» Ion;;' r than wide, tlio last 

 t\vi<»' as Ion;; as tlir |M'nnItiniat<' 1'. Kii.U'iiicNls. 



I'edi<-4'I as lon^ as tho tirst and socond I'nnii-lar Joinls nnihtl, t lie second 

 swidlcii, till- Juints of tin; clnli twirc at* long as tliirk, tht; last not 

 twice U8 loug as the pennltiniate 1'. CAUiolcMCls. 



PolygnotuB aalicicola, h]>. nuv. 



S 9 . lAMij,'tli, O.SO to 1. to PoIislM'*! bliM'k ; head tlirit-e as wide as 



tliick aiitero iM)stt'ri<>rly, the vertex posteriorly stroiifjjly transversely 

 aeieidat«'d, I'aee smooth. Aiit«iiiia; 10 jointed, black, the llaj^elhun not 

 «|uite tvvit-e as lonjj sis the scape; pedicel as lonj; as tlie first and second 

 tnniclur j()ints toj;ether but stouter, the tip i>ale; joint I of tiimclc 

 very small, yellowish, not as lonjjf as thick; second scarcely twice as 

 lonj" as thick, third shorter, I'oiirth no huij^er than the third but a littie 

 st<uiter, rounded basally; club joints, except the last which is lon}j:er 

 than the inecedinj*-, as wide as lonji, truncate at tii>s and rounded bas- 

 ally. Thorax ovoid, the collar anteriorly sli<;htly miirroscopically sha- 

 jiieened, niesonotal furrows most Irequently entirely wantinj^, seldom 

 slijjhtly indicated posteriorly, the base of the i>arapsides, just in front 

 of the scutellum, delicately punctate and spars<'ly pubescent. Scutel- 

 luni transversely liijjhly, convex, jjolislicd. Arcl:i])leura nearly bare, 

 delicately sculi)tured. Tej^ula* black. N\ injjs hyaline, iridescent, jiu- 

 bescent. Legs black, the tibia', and tarsi i)iceous or brown-black. 

 Abdomen very slightly larger than the thorax, ])olished, the petiole 

 fluted at base, the second segment with two slight foveolaj at base 

 which are faintly aciculated. .t?. 



The S is usually the smaller, the abdomen being scarcely as long as 

 the thorax, and broadly rounded behind, while the ditlerences in the 

 antenna' readily distinguish it. The tlagellum is covered ^ith a rather 

 dense, short, white pubescence; the pedicel oval, not longer thau the 

 second funidar joint; first fun iclar joint nioniliform; second thickened 

 at tip, and longer than any of the club joints except the hist; club joints, 

 excei)t the last, not longer than thick, the last pointed, fusiform, twice 

 as long as the penultimate. 



Habitat. — Los Angeles, Cal. 



Types in National Museum. 



13red by A. Koebele ffom a Cecidomyiid gall on the midrib of willow. 

 21809— No. 45 *30 



