IIESPKRIDI; THE GENUS HESPERIA. 1529 



fully t\vi)-tliirds as long as the fore femora or the liiiul tibiae, aiul a little more than 

 half as loiii; as the niiiliUe tibiae ; foiiiile appemlase of fore til)iae loii^ and slender, 

 attaclic<l a little beyoml tlio middle of tlie joint, extending somewhat beyond it, live or six 

 times as ions as broad, tliicker above tlian beneatli, i'<|nal excepting tlie cnrvin;; apical 

 third, wldch tapers to a rounded tip; liind tibiae of inaic; sometimes fnrnislied witli 

 a basal pencil of liairs; middle and hind til)iae furnisiied at tip beneatli with a pair of 

 loiii; and very slender spurs, the hind tibiae withasubsiiliary pair, exactly similar, in the 

 midille of the outer four-llfths; hind coxae of male sometimes supplied with a special 

 subcorneous appendage. Tarsal joints 1, 2, 3, 5, 4, the terminal longer than the 

 penultimate joint; fore tarsi three-quarters the length of the other pairs, of the same 

 length as tlie middle tibiae, all with a triple row of long delicate spines beneath, the 

 terminal ones on each joint a very little longer than the otliers. Claws small and deli, 

 cate, tapering very strongly and pretty regularly arcuate; pad moderately large, a little 

 transverse; paronychia very slender, rilibon iilje, fringed beneatli, tapering, nearly half 

 as long as the claws. 



Upper organ of male abdominal appendages having the centrum small, broad, almost 

 depressed ; hooks consolidated into a single prominence as long as the centrum ; lateral 

 arms extending backward horizontally as a triangular, pointed lamina. Clasps rather 

 large, simple, a little convex, two or tiiree times longer than broad and nearly equal ; the 

 upper lobe large and broad, not very high, separated from the parts beyond by a pretty 

 deep notch, the ape.x of tlie blade rounded oil", sometimes bearing above distinct denta- 

 tions. 



Egg. According to notes furnished by Prof. E. A. Popenoe the egg of H. tessellata 

 is nearly spherical, Ilattened at base, with a very large number of vertical ribs. 



Mature caterpillar. Head appressed globular, somewhat broader than high, of 

 nearly uniform depth, twice as high as deep, the two hemispheres with scarcely inde- 

 pendent arcuation above; the frontal triangle extending more than halfway up the 

 front, half as high again as I}road, equ.al on the lower h.alf , arched above ; inner triangle 

 much smaller, more regularly triangular; the surface of the head so strongly and 

 closely punctate with moderately large punctae as to be subrugose, excepting pos- 

 teriorly where it is smooth. Pile composed of branching hairs. Epistoma broad, 

 equal ; labrum very short, forming a broad, arcuate piece, with a broad, considerable, 

 median excision. Ocelli six in number, four anterior ones placed in a shallow arcuate 

 row at subequal intervals, the third from above the largest, the lowermost close beside 

 the antennal socket ; of the two remaining, the upper and smaller is posterior to the 

 uppermost of the arcuate row, and as far removed from it as the former is from a point 

 midway between the two middle ocelli of the arcuate row; the lowermost is posterior 

 to the third of the arcuate row, and is distinct from it as far as is the uppermost of that 

 row. Antennae with the third joint cylindrical, about two and a half times longer 

 than broad, the bristle twice as long as it. Mandibles stout, thick, laminate, tapering, 

 more than half as broad at tip as at biise, truncate, chisel-edged. 



Body slender, largest at the fifth and sixth abdominal segments, tapering forwards 

 very gently, excepting on the thoracic segments, where it more rapidly becomes nar- 

 rower, though still by slow degrees, tapering posteriorly with greater rapidity, the last 

 segment being much narrower than the preceding, narrowly rounded apically; first 

 thoracic segment with a short, anterior neck, constricted to nearly half the width of 

 the head, the posterior portion of the segment with a narrow dorsal shield extending 

 from spiracle to spiracle ; posterior half of each of the abdominal segments broken 

 up into three subequal transverse sections, and another similar one imperfectly set 

 oflr from the othenvise uniform anterior half of the segment in advance of them. 

 Body completely covered with minute papillae arranged in single, transverse rows, one 

 each on the short, transverse sections, but with entire irregularity on the anterior half 

 of the segments ; some of these are arranged in definite longitudinal series of which one 

 consists of a laterodorsal row in the middle of the anterior half of each segment, and 

 these are somewhat larger than the average and support hairs twice as long as they, 

 but all support otherwise similar, slender, apically expanding hairs. On all the 



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