128 PSYCHE [August 



trumpet-shaped spines which arise from conical, sub-conical, or elongated thick 

 protuberances as type no. i : trumpet-shaped spines which arise directly from the 

 surface of the body or its appendages as type ?io. 2 ; and long simple spines which 

 arise directly from the surface of the body or its appendages as type no. j. 



First instar (PI. 3, figs. 3 and 4) : — Length about .53 mm., greatest Avidth about .24 mm. 

 The general form is an elongated ellipse, the head end being a little more broadly rounded 

 than the anal end. When first hatched the body is pale in color but gradualh' turns to dark 

 brown and in a few hours acquires a greenish tint. The rostrum, — except the tip which is 

 brown, — antennae, and legs are pale yellowish but soon become greenish. This greenish 

 color of the body and appendages is apparently internal, perhaps due to the blood. The 

 part of the head which projects in front of the prothorax when viewed from above is almost 

 semicircular in outline. The hinder fifth of the head is rounded and covered by the prono- 

 tum. The compound eyes consisting of five reddish facets each, are situated on the extreme 

 sides of the head just in front of the pronotum. Anterior to and a little below the eyes arise 

 the three segmented antenna, the first two segments of which are short and stout, subequal 

 in size, the second one bearing a verj' few slender spines. The terminal segment is about as 

 long as the first two together, clavate, broadest at about three fourths of the distance toward 

 the apex, from which point it tapers gradually' toward the base and rapidly toward the tip. 

 It is slightly curved posteriorly and is provided with long spines some of which are of type 

 no. 3 and others of type no. 2, also with many small simple spurs and blunt sense cones near 

 the tip. The entire length of the antenna is about two fifths the length of the bod}-. The 

 rostrum is four segmented and about three fifths as long as the entire body, reaching when 

 bent backwards, to the middle of the fifth abdominal segment. The rostral setae are 

 comparatively stout. The labrum is hyaline and about two thirds as long as the basal 

 segment of the rostrum. Beginning at the upper side of each eye there is a light streak in 

 the integument above, which curves forward and then backward to a point about opposite its 

 origin in the middle line of the head where it meets its fellow and a median longitudinal 

 streak which extends back to the base of the abdomen. It is along these streaks that the 

 integument splits when the insect moults. On each of the two obtuse angles formed by the 

 union of the transverse streaks on the head and the median longitudinal streak are situated 

 two stout spines, one being directly in front of the other, — the posterior spines of type no. 

 2 being directed posteriorly, the anterior spines of type no. i being directed anteriorly. 

 Two very minute spines of type no. 2 arise on each side of the median streak between the 

 bases of the two posterior spines. Near the anterior end of the head there are two more 

 pairs of spines of type no. i, situated one spine of each pair on each side of the middle line. 

 The subconical protuberances from which the posterior pair of these spines arise, unite at 

 their base. 



The thorax from above is about as long as the head from front to rear and is slightly 

 wider than the head at its widest part. The prothorax is a little larger than the mesothorax 

 and the mesothorax is a little larger than the metathorax. The pro- and mesothorax bear on 

 each lateral margin a spine of t\'pe no. i, which with its base is about one sixth the width of 

 the thorax. On each side of the median streak of the prothorax there are two minute 

 circular openings appearing as minute light spots. On each side of the median streak of 

 the mesothorax arises a spine of type no. i. The legs are quite stout and when straightened 

 are nearlv as long as the bodv. The coxae are stout, nearlv as lon<i as broad. The 



