72 PROCEEDINGS OF THE NATIONAL MUSEUM, vol. 60. 



until the publication of the Fernald Catalogue in 1903, at which time 

 vi7'idis was indicated as the type. 



The Maskell collection contains three slides of the type species, one 

 of " old females from Rubus, June, 1877," one of " Female, early 3d 

 stage, Jan. 1890," and one of "Adult male, 1890," and some un- 

 mounted specimens under No. 33. It has been possible to obtain 

 additional mounted specimens from this latter material, and most of 

 the following descriptive notes have been obtained from these later 

 mounts. There is no positive evidence, however, that the unmounted 

 specimens were from the original type lot of material. 



Adult female. — Bright green in life (Maskell) ; very flat in dried 

 state, broadest behind, somewhat acuminate and asymmetrical an- 

 teriorly; test incomplete and broken in old forms; derm not very 

 heavily chitinized; antennae small, slender, 6-segiTiented, the third 

 very long; legs small, normal, the claw very short and stout, the 

 tarsal digitules slender, knobbed, the claw digitules more flattened 

 and expanded through their whole length ; mentum very short, broad, 

 apparently 1-segmented ; margin of body with a row of widely sepa- 

 rated, small, conical spines, placed about 4r-5 times their own length 

 apart; spiracular spines represented by a single long spine opposite 

 each spiracle; no dorsal setae observed; ventrally with long hairs 

 near the antennae, and in pairs anterior to the anal plates, and also 

 with some small scattered hairs; dorsally with tiny tubular ducts, 

 widely scattered and each surrounded (in stained specimens) by a 

 small, circular, clear area, also with a short transverse row of tiny 

 disk pores some distance anterior to the anal plates and a few similar 

 along the body margin ; ventrally with a scattered row of quinque- 

 locular disk pores between each spiracle and the margin, and with 

 numerous larger multilocular disk pores in transverse and encircling 

 bands anterior to and around the anal plates ; these latter circular to 

 oval with as many as eleven to twelve loculi and oval centers, also 

 with the tubular ducts ventrally, at least near the margin ; anal plates, 

 when flattened, broad and stout, tapering to a blunt point posteriorly, 

 with a slender apical spine, two similar, subapical, on the inner face 

 of each plate, and (probably) a much larger subapical dorsal seta 

 (represented only by the clear spot in the chitin to which the base 

 was presumably attached), with two ventral setae near the base of 

 the ridge, fringe setae apparently wanting ; anal ring with six setae, 

 one pair larger and longer than the others, and a double row of pores, 

 placed a little anterior to the anal plates. 



Intermediate stages. — Not available. 



Lai^a — (embryonic only). Broad ovate, slightly narrowed behind; 

 antennae 6-segmented; legs normal, claw without denticle, tarsal 

 digitules knobbed, one much stouter than the other, the more slender 

 inserted a little above the other, claw digitules similar, one much 



