392 Dr. J. L. Hancock's Further Studies of 



Genus Holoarcus, ncv. 



Resembling Pie^otetti.i; but difTering in having all tlie margins of 

 the pronotal crest entire and arcuate, the summit silicate, in the 

 almost ol)soIete lateral carina', in the acute an<,ded apex of posterior 

 process, and the strongly dilated hind femora bearing denticulate 

 margins. 



Including the type alimotvs herewith de.scrihcd, I'iczotct' 

 tix arc2iatiLS, Haan, and riezotetti): sidcatus, Stal. 



1. ir. altinoius, sp. nov. (Plate XXII, fig. 2.) 



Allied to arcnxttxs, Haan. Body ochreous-ferrnginous ; vertex 

 wide, about twice the width of (me of the eyes, elevated considerably 

 higher than the eyes, tumid, with minute vestigial carinnhc on each 

 side next to the apices of the conoidal eyes ; frontal scutellum trian- 

 gular and open below, very slightly arcuate between the antenna? ; 

 the antenn;e short filiform, as long as the face from vertex to 

 clypeate margin below, inserted barely below the ej-es; posterior 

 ocelli placed distinctly in advance and little below the middle of 

 the eyes; maxillary i)alpi having the Tast articles dilated, hirsute. 

 Pronotum strongly compresso-foliaceons, the whole crest punctate- 

 translucent when held against the light ; anteriorly advanced over 

 and beyond the head, the dorsal margin of crest presenting a highly 

 arcuate outline in profile but little depressed forward above the 

 lateral lobes, the summit sulcate, posteriorly the crest more sloping 

 than in front, the apex acute angulate and extending backwards 

 nearly to the ajiices of the posterior femora ; sides of pronotum 

 little rugose bearing light radiating reticulations ; the lateral carina) 

 very little expressed. Superior margins of anterior femora entire, 

 the inferior lightly bidentate ; middle femora elongate, margins 

 subentire ; posterior femora strongly dilated, the superior margin 

 strongly arcuate, from the middle backward tridentate, the ante- 

 genicular and genicular lobes acute, the external pagina above longi- 

 tudinally nodulose, bearing oblique rugse forward between the 

 cariniB but scabrous and interrupted distally ; hind tibia; rather 

 stout, the margins armed with ten or eleven valid spines, the inner 

 margin having about six or seven spines ; first articles of the posterior 

 tarsi elongate, the third pulvilli distinctly longer than the second. 

 Valves of the female ovipositor having the superior glades constricted 

 at the middle, slender and denticulate. 



Entire length of body, female (same as pronotum), 13'5 mm. ; 

 posterior femora 9 mm. ; width 3"5 mm. 



