356 PROCEEDINGS OF THE ACADEMY OF [April, 



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

 freely. All setae pale yellow, all ratiier siiort 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 straighter laterad, caudad, mediad and back nearly to 

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

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

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

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

 prominent, verv" 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 smootn or more or less scupltured or exen 

 tufted. Neurosetae 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 ciu'ved 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. 



Ehi:ra fifteen pairs having the usual arrangement. Very little is 

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

 the}" 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 beare along the posterior 

 margin, be3^ond 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 brown, each segment marked by two delicate 



