18 LECANOPSIS FORMICARUM. 



subdorsal stripes of dusky purple, converging at 

 the anal lobes, disappearing on the thoracic seg- 

 ment, but appearing again towards the margin in 

 front as two distinct spots, which might be easily 

 mistaken for the eyes. Form elongate, narrowed 

 in front from the middle, flat convex ; margins rather 

 broad and flat ; segmentation distinct. Eyes on the 

 extreme margin, anterior to the two dorsal eye- 

 spots, very small and nearly black. Antennae (fig. 8) 

 rather long, of eight joints, of which the third is 

 longest, and the first is nearly as wide again as 

 the second ; there are two or three short hairs on 

 the first and second joint, there is a long one on each 

 of the fourth and fifth, followed by shorter ones on 

 the succeeding joints, the terminal joint possessing 

 several; formula usually 3, 1, 2, 4 (5, 6, 7, 8). Legs 

 (figs. 9, 9 a) much longer than antennae, stout, and 

 comparatively short, with many fine short hairs, and a 

 long one on the trochanter; apex of tibia3 produced 

 inwardly (fig. 9 a) ; tarsi short, less than half the 

 length of the tibias ; digitules to claw dilate with trun- 

 cate extremities ; those of the tarsi ordinary. Mentum 

 uniarticulate and very short ; rostral filaments (loop) 

 very short, scarcely longer than the basal portion of 

 the rostrum. Spiracles large (fig. 10), exterior flange 

 and opening approximately circular; parastigmatic 

 glands minute, placed in a more or less circular 

 depression ; anal cleft moderately deep ; anal lobes 

 large ; character of anal ring doubtful. 



Long, 5 5* 50 mm. ; wide, 22*50 mm. 



Larva elongate ; antenna of six short Avide joints, of 

 which the third is longest, basal joint very broad. 

 Legs short and stout, tarsi shorter than the tibiae, digi- 

 tules to claw and tarsi ordinary. Anal lobes and cleft 

 normal ; character of anal ring doubtful. Eostrum 

 very large ; mentum uniarticulate, wider than long ; 

 unexpanded filaments (loop) reaching to base of fourth 

 abdominal segment. Abdominal segments each with a 

 hemispherical disc, surmounted by a short slender hair, 



