Life Histories in the Hepialul Grovyp of Lepidoptera. 419 



wings. The time of appearance of imagines is different, 

 there being a full month's interval, I have a note that in 

 1899 I obtained ovie of P. signata, but failed to rear the 

 larvffi. In 19U0 I obtained a number of female P. sig- 

 nata, but none deposited ovae, whereas I experienced no 

 difficulty in obtaining ovee from P. timhraculata. 



3. Contribution to the life history of Charagia vircsccns, 

 Dbld. 



Larva ahoid three months old. 



I have been unable to obtain the ovse of very young 

 larvffi ; this species lives at least two years — possibly 

 three, but I think the former. 



•Length \^ inch. Straw colour, head reddish yellow. 



Viewed laterally : Head, with serrated jaws. Spinneret 

 long and fine. Ocelli in two parallel rows of three each. 

 Antennae, with broad basal joint, narrow second joint, 

 shorter third emitting a bristle and three slender processes. 



Prothorax : anterior series of hairs on scutellum, as in 

 Porina ; a mid-lateral black concavity on scutellum, enclos- 

 ing three hairs, the middle hair being strongest ; below is 

 a single hair on scutellum lateral edge : these represent 

 the second series of hairs on Porina. The spiracle is 

 posterior, below the scutellum ; an anterior tubercle with 

 two hairs above the legs. 



Meso- and meta-thorax : anterior trapezoidals on anterior 

 subsegment. Posterior trapezoidals more remote, single 

 seti.e stronger than the sette of anterior trapezoidals, on 

 principal subsegment; below, but on same swollen area, 

 are two sette, and posterior to the lowest is a small 

 tubercle with one hair, these approximate to the anterior 

 series of prothoracic scutellum ; also a small tubercle v»'ith 

 one hair anterior to the principal subsegment, above the 

 legs are an anterior and posterior swelling with one seta 

 each, and two setae above base of legs. Intersegmental 

 membranes of thorax have one subdorsal hair. The 

 thoracic legs have hairs at or above the joints. 



This specimen had a remarkable abnormal tubercle on 

 one side only of the first abdominal segment, this had 

 two perfectly formed anterior trapezoidals each with one 

 seta, situate one below the other ; on the opposite side of 

 the larva the anterior trapezoidal tubercle was normal, 

 with one seta; posterior trapezoitlals normal in position, 

 TRANS. ENT. SOC. LOND. 1900. — PART III. (OCTOBER) 28 



