Early stages of Latiorina pyrenaica. 399 



Aug. 9th, 1915. — On arrival home from Gavarnie, fomid 

 an egg that was discovered naturally laid had hatched, 

 and from the situation of some traces of frass it was obvious 

 that the larva had penetrated into the centre or base of 

 the central bulb of leaves. An examination of other eggs 

 led to the belief that none had hatched. 



Aug. 10th. — Found that several eggs of pyrenaica had 

 hatched, and the bulbs in which they were being very wasted, 

 the larva were extracted and placed on growing plants. 

 The larvae in one or two cases were free and newly hatched, 

 but several were found beneath the central growing point in 

 the top of the stem; sometimes a trace of frass showed 

 where it had entered, in other cases there was no indication 

 externally; the place seemed to be between what was the 

 nearly solid central ball and one of the next free leaves. 

 The other eggs (unhatched) were placed one each on the 

 bulbs of growing plants. 



Aug. 13th. — All the eggs appear to have hatched; here 

 and there a little frass shows where the larvae have disap- 

 peared, but for the most part there is no indication of what 

 has become of them, though they are no doubt in the tops 

 of the stems just below the growing point. In one case 

 only, a larva is seen in the interior of one of the larger leaves, 

 where it has mined out all the green material, leaving the 

 colourless, translucent cuticles, 



Aug. 20th. — Found various heads of Androsace, with the 

 centres loose and dead, the larvae having eaten their bases ; 

 in several cases the larvae were seen, apparently (but not 

 certainly) still in 1st instar ; in other cases the larvae had 

 either gone off elsewhere or had eaten down into the root 

 stock, as was suggested by frass covering the centre when 

 the dead central bud was removed. One larva seen was 

 very fat, nearly black, and very glabrous and shining; 

 another had black with paler longitudinal stripes, the black 

 predominating; in two cases, the central loose bud being 

 removed, the larvae were seen to be in the interior of an 

 adjoining leaf. 



Aug. 21st. — ^A larva not wholly black has a broad black 

 dorsal band, then a pale band, then a broad black band 

 down to lateral flanges, the hairs of which are on a large pale 

 patch in each segment. The dark band on slope has various 

 pale spots, especially a large patch about the middle of it 

 (on each segment) ; the length of the larvae is barely 2 mm. 

 stretched. Head black, legs black, but the plates too thin 



