356 PROCEEDINGS OF THE ACADEMY OF [April, 



Acicula of the usual form, pale yellow, the acute ends projecting 

 freely. All setae pale yellow, all rather short and little spreading, 

 becoming very little longer caudad. Notosetae in a single ranked 

 whorl, this arrangement obscured by their being depressed. The 

 shortest and most curved are antero-medial and they increase in size 

 and become straight er laterad, caudad, mediad and back nearly to 

 starting point. They are much stouter than the neurosetse, many 

 being two and one-half to three times the diameter of the latter, more 

 or less curved and tapering to blunt tips (Fl. XXX, fig. 33); pectina- 

 tions extending over more than one-half of exposed portion, rather 

 prominent, very regular, two to two and one-half rows in distance of 

 greatest diameter, continuing nearly to tip leaving only a very short 

 and blunt point which is smooth or more or less scupltured or even 

 tufted. Neurosetse in vertical fan-shaped tufts directed nearly 

 laterad. They are numerous and crowded and appear to be in four 

 or five supra-acicular and eight or nine subacicular series. Nearly 

 colorless with long, slender, very slightly curved shafts; the distal 

 enlargements (PI. XXIX, fig. 30) rather prominent and long, gracefully 

 curved and tapered; the pectinated appendages rather long and in 

 face-views conspicuous, finely and deeply divided, rather widely 

 spaced, and not numerous, from sixteen in ventral to twenty-three 

 in dorsal series, the proximal ones small; smooth ends long, often 

 three to four times diameter of seta, with rather strongly hooked tips 

 below which on all except the ventralmost is a very slender, acute 

 accessory process reaching nearly to the main tooth. 



Elytra fifteen pairs having the usual arrangement. Very little is 

 known of them, few remaining with the specimens. So far as known 

 they are rather small and probably leave a portion of the dorsum 

 uncovered. The first is circular, the next two very deeply reniform 

 or broadly lunate (PI. XXX, fig. 32), the others ovate reniform with 

 a small and very excentric area of attachment. All known are soft 

 and semi-gelatinous or gelatino-membraneous in texture and the 

 dorsal surface is thickly studded with small conical or truncate rough- 

 ened spines or horny tubercles among which a few longer cilia are 

 scattered. Rather long cilia form a somewhat dense fringe along the 

 lateral margin. In addition each elytron bears along the posterior 

 margin, beyond which they project freely, several (4-7) large, recum- 

 bent, inflated, ovate, deep brown, soft papillae which are usually very 

 conspicuous and give to the elytron a very irregular outline. 



Entire middle field of dorsum between elytrophores deep chocolate 

 brown, rarely paler In-own, each segment marked by two delicate 



