450 ENTOMOLOGICAL NEWS. [DeC, 'll 



Mature larva. 



Description based on larvae Nos. i, 2 and 58, and exuvise of 55, 57, 

 59, April 28, May i, Orosi (2) and Cordoba. 



Color, pale yellowish- to reddish-brown, according to the length of 

 time which has elapsed since moulting, posterior ends of abdominal 

 segments darker. 



Head concave in the middle posteriorly for the reception of the 

 prothorax, angles of the hind margin rounded off and clothed with 

 short hairs and short spines. Compound eyes distinct. Ocelli indi- 

 cated by three pale yellow spots. 



Antennae 7-jointed, ratios of the lengths of the joints in an antenna 

 detached from larva No. i and in alcohol under a cover-glass : 18. 20. 

 .^3. 26, 19, 12, 7; joints I to 7 successively decreasing in thickness 

 (PI. XVII, Fig. 3), the distal ends of joints 3-6 a little thicker than 

 the proximal ends ; naked, except for a whorl of long and very deli- 

 cate hairs on the middle of the 2nd and 7th joints and near the distal 

 ends of the 4th, 5th. 6th, and, in some, also the 3rd, joint; in dry 

 exuviae, e. g. after metamorphosis, these hairs are often matted down 

 on the antennae and not visible except under a compound microscope. 



Ventral surface of each gena with a row of about twenty short 

 spines parallel to the posterior margin of the compound eye, the spines 

 directed forward. 



Mandibles one-branched, apex of left mandible with five teeth, first 

 (counting from the dorsal margin) and third shorter than the other 

 three, ventralmost longest; apex of right mandible with four teeth 

 more nearly equal in size, ventralmost longest. 



Maxillae very similar to those of the larva of Cora described and 

 figuned* in the first study of this series, except that the attenuate tip 

 of the inner lobe bears two, instead of three teeth. 



Labium, when at rest, reaching almost or entirely to the hind edge 

 of the prothorax ; mentum about twice as wide at the level of the 

 articulations of the lateral lobes as at its proximal end (PI. XVIT, 

 Fig. 6), strongly produced distad to form the median labial lobe which 

 lacks the slightest trace of a median cleft, but bears 32-41 crenulations 

 on each side of the median line (PI. XVII, Fig. 2), usually a short 

 blunt spine in the excision between each crenulation and the next ; 

 three or four pairs of setae near the middle and other shorter setae 

 situated more proximad and more laterad, and a number of very short 

 pointed spines near the crenulated distal margin, on the dorsal mental 

 surface; each lateral mental margin in the distal half with 14-21 short 

 conical articulated spines, which series is continued mesad by about 

 4 similar spines on a thickening near the articulation of menfum and 

 lateral labial lobe ; on the ventral mental surface are two pairs of 

 moderately long setae, one pair proximal to, the other pair distal to, 

 the level of articulation of the lateral labial lobes, and many small 



*Ent. News, XXII, p. 53, pi. Ill, Figs. 29, 31. 



