32 GEO. H. HORN, M. D. 



right angle to the hody, last three abdominal segments arcuate for- 

 ward. Head and prothorax twice as wide as mesothorax, from the 

 latter to fifth ventral body gradually broader, then slightly narrowed 

 to tip. Viewed laterally the body is nearly of equal thickness except 

 at the gibbosity of the fifth abdominal. Length of larva in normal 

 flexed position .80 inch; 20 mm; width about .16 inch; 4 mm. Evi- 

 dently not fully developed. Plate II, fig. 2, 2 a to 2 e. 



Head corneous, slightly concave, piceous with feeble cupreous 

 lustre, general outline semicircular. Surface slightly longitudinally 

 wrinkled in front. Frontal suture distinct, indicated by a paler 

 transverse space. Clypeus trilobed, middle lobe moderately promi- 

 nent, edge obtusely toothed, separated from the lateral lobes by a 

 feeble acute notch exterior to which is a small tooth, lateral lobes 

 much smaller than the middle, rounded. Vertex with distinct trans- 

 verse carina posteriorly, two setae at middle near the frontal suture, 

 others at the sides, hind angles of head rounded. Head beneath 

 convex, longitudinally impressed, broadly cordiform. Anterior margin 

 trilobed, middle lobe truncate in front, lateral lobes more promi- 

 nent than the middle, their anterior margin nearly transverse, form- 

 ing a right angle with the inner margin, limited posteriorly by 

 an elevated line extending from the base of the mandible to the 

 inner lobe but net ascending along the outer side of the latter as 

 in Amblijchila. 



Eyes — These are four in number on each side, two larger very 

 convex, on the upper side, the posterior larger than the anterior; 

 two smaller eyes on the side of the head, the anterior immediately 

 beneath the superior eye, the other more posterior, somewhat larger, 

 less convex and transparent. Around the eyes are small setigerous 

 tubercles. 



Antenna four jointed, situated on the front, behind and above 

 the base of the mandibles and in front of the anterior eye ; about 

 half as long as the mandibles ; joints 1 — 3 equal in length, the first 

 two stouter, joint four half the length of the third and more slender. 

 The first two joints have moderately long setae, three at their distal 

 end and two at middle, the third joint has very short setse at tip, the 

 fourth two moderately long slender setae at tip. 



Mandibles falciform, acute at tip, when closed applied against the 

 frontal margin, an acute tooth on the inner margin slightly behind 

 the middle. * 



Maxillae semi-corneous, elongate, arising in the notch on each 



