Vol. XXvi] ENTOMOLOGICAL NEWS. 3OI 



The exuvia of April 30 was probably lost in the earthquake. 



The following description is based on all the larvae studied and on 

 the two exuviae of inopinata $ and pellucida $ . The differences 

 shown by the larvae of various sizes are given in the table on page 

 304. As has already been stated,* I have not been able to find any dif- 

 ferences between these two exuviae other than those due to injuries 

 sustained by the larvae previous to transformation. 



Head shallowly concave posteriorly. Compound eyes and their om- 

 matidial lenses very distinct; in most of the alcoholic larvae the dorsal 

 surface of the eye below the chitin showing dull greenish-blue with 9 

 to ii diverging darker streaks which radiate from a point caudad to 

 the inner posterior dorsal angle of the eye. Ocelli indicated by three 

 smoother patches amid the otherwise finely wrinkled and finely spinu- 

 lose dorsal surface of the head. Nasus of the larvae with four pale 

 streaks extending from its superior to its inferior margin, two of them 

 submedian, the other two lateral, right and left. Labrum hardly 

 notched on its free margin, which is obscured by matted hairs in the 

 exuviae, especially at each side where, viewed from above, they form 

 a small tuft. Edges of the genae which bound the eyes posteriorly and 

 inferiorly with a row of closely-set spinules. 



Antennae 7-jointed, decreasing in diameter from I to 7, lengths of 

 the joints in larva No. 4: (i) .64, (2) .48, (3) .4, (4) .224, (5) .224, 

 (6) .16, (7) .064, total 2.192 mm. 



Mandibles stout. Right mandible (PI. XI, figs. 4, 41) at its apex 

 with four teeth, of which the most dorsal or foremost is usually the 

 widest, the second the smallest, the third and fourth longer than the 

 other two, the fourth longest and having on its inner ventral edge a 

 small basal denticle; on the inner surface, proximal to and distinctly 

 separated from these apical teeth is a shorter, tapering and curved 

 process terminating in an acute apex and bearing a minute anteapical 

 posterior denticle. Left mandible (PI. XI, figs. 5, 51) with apical 

 teeth similar to those of the right, but the foremost (most dorsal) 

 tooth has a small dorsal denticle (except in larva No. i) and the 

 fourth (most ventral) tooth has no basal denticle and in some is no 

 longer than, or even not quite as long as, the third tooth ; the process 

 on the inner surface is much larger antcro-posteriorly than that of the 

 right side, forming when viewed from below (the mandibles being 

 open) a crescent-shaped ridge whose edge is crcnulate or denticulate 

 and terminates at both anterior and posterior ends in a slender acute 

 spine; the concavity of the crescent is proximal. These processes of 

 the inner surface of each mandible appear to correspond with the inner 

 branch of the mandible of the larvae of Cora.t The lateral surface of 



* Ent. News, xxv, p. 345. Oct., 1914. 



t Cf. Ent. News, xxii, p. 52, pi. II, fig. 16. 



