al)lc, cs[)ociiilly as the licad ol" llin l']m(i|)c;iii P. fiiscio/aria is ncaih normal, 

 liavinjr no crc^sl mi the clyiiciis, In holii species, liowever, llie occiput is 

 luodenitely long, hnl not as usual excavjitcd in tVont ; on tlu; conlrary, (lie 

 iVont ('(1^0 is roniarUalily straiirlif, Uie piece not dilalinti- on llie side. "^I'lie 

 epicianiuin in I', linictdiia is raised al)ove the surface el' I lie iiead ; it is trape- 

 zoidal ill out line. Iwo-lliirds as wide in li-ont as Ixdiind, the anterior ed;;!- 

 I()riniug a thin projecting cr(^st overhanging the base ol' the clypeiis. 'I'iiis 

 lallcr jiiecc is not separated as usual hy a well-detined suture iVoni theoriiits. 

 The middle area is much raised, olilong, lioiind by a high, Ihin crest; the 

 lateral crests denticulated. Along the middle of the ohloiig inclosure runs a 

 liigh, rouiidi'd dcnliculatcd crest. There are no ocelli. 



Zcroip aitcnaria. — Resouililes closely Fidoriia. The iVont is very l)roa<l, 

 and widens more on the occiput than in Fidoiiiit. Occiput liirming a wider 

 ridge than in Fii/oxia ; eiicroa(died upon in the middle \>y the epicranium, 

 l)ut widening on the side rapidly. Epicranium small, subtrapezoidal, not 

 veaching the occipital region : moderately convex, a'.id hinder edge moder- 

 ately rounded. Anteuiue much nearer together than in Fidoiiia. Clypeus 

 trapezoidal ; sides narrowing in front. No longer than iiroad ; surfiic(! mod- 

 erately convex; tongue rather long, and of the usual siz(?: occi[)ital region 

 rather wide; clypeus rounded in front. Lahrum as usual ; mandiijles minute, 

 slender, not overlapi)ing the tcuigue. Tegument dark mahogany brown- 

 Eyes a little larger proportionally than in Fidonia. 



Eujhdila rihcaria. — Occipital region widening moderately; occiput very 

 large, about one-third as long as \\i(l('; of the same length tliioiighout, on the 

 sides as in the middle. l']picraiiium small, Mibtriangular : inler-anteiinal sjiaci; 

 rather nari'ow ; the epicranium divided into two jiarts i^y a ridge just ojipo- 

 site the hind edge of the auteiiii;i'. Clypeus s(piare, a little longer than broad. 

 The clypeal region narrows a little anteriorly. Eyes large and gloiiular; 

 tongue long and well developed : mandibles long, sleiuhir, partially overlap- 

 ping the tongue ; labrura as usual. 



Fantlierodcs pardalaria. — 'i'his Brazilian species closely resemble.*; 

 Eiifitcliht; the clypeus lA' Faii/heiodcs is a little longer and Hatter, and the epi- 

 cranium is a little fuller, but tlii' relative size of the three pieces are the 

 same. 



Acida/ia A /i/teata (pi. fj, (ig. 21). — Front lather narrow, widely diverging 

 on the occipital icgion, with lari,M' full uloiiose eyes risiiii,' considerably aiiove 



