28 PACKARD, NOTES ON THE 



The labium and basal portion of the maxillae are broad and 

 thick. 



The body is elongated and gradually increases in width to 

 the eighth ring, which is much enlarged and raised into a 

 hump, from which the body rapidly narrows, and the tergum 

 falls down at an angle of about 45 to the broad lunate supra- 

 anal plate. 



The rings are slightly convex ; across their middle is a row 

 of tubercles ending in hairs equal in length to that of the ring 

 itself. Upon the tergum of each ring are four large tubercles 

 arranged in a broad trapezoid, two in front and two more dis- 

 tant, on the middle of the ring ; on the thoracic rings these 

 tubercles are arranged in a single transverse line and on the supra- 

 anal plate in a square. Below is a lateral row of similar warts, 

 one for each ring, immediately below which is the row of stig- 

 mata, behind which, on each ring, is a minute wart. On the 

 pleural line of the body, formed by the triangular raised portion 

 of the side of each ring is a tubercle ; and at the base of all the 

 legs is a single similar wart. On the sternal side of the body 

 on the segments between the legs, is a transverse row of smaller 

 warts than those above, which are inclined to be geminate 

 between the true and false legs. There is a distinct thickening 

 of the skin on the sides of the anal legs, as in the Bombyces. 



The coloration of the body generally, is a light hue, with 

 linear transverse tergal stripes, about six for each ring, and 

 nearly black in color, which are interrupted near or between the 

 tubercles. 



On the vertex of the head are four black spots ; below in a 

 curvilinear line are three black spots on each side of the epicra- 

 nium, and two on the front edge of the clypeus. Around 

 the V-shaped apex of the epicranium are smaller dots. There 

 is a single dot within and opposite the eyes which are arrang- 

 ed in a line forming a little more than a semicircle. All these 

 spots give rise to minute hairs. 



In another lot (which may possibly be the young of E. unio) 

 are some smaller than the specimens noticed above. The head 

 is much the same, but the clypeus is smaller, and its sides do 

 not bulge out. The spots on the head are the same, but the 

 eyes are not surrounded with black. The eighth ring is more 

 distinctly humped. The whole body is smoother, since the 

 tubercles in Eudryas grata are here merely black spots, and 

 much smaller, so that the transverse tergal lines are much more 



