30 Mr. G. R. Waterliouse's Descriptions 



minal joint truncated at the apex. Labium quadrate. Puljnger 

 transverse. Labial palpus 3-jointed (?) *. 

 Body elongate, conical, excavated beneath, and furnished with two 

 fleshy prolegs. 



3 a. Larva, magnified. 3 h. Antenna. 3 c. Labrum. 3 d. Mandible. 

 3 <?. Maxilla. 3/ Labium. 3^. Telum. (Newm.) Z h, li. Vxo\egs. 



3 i. Foie leg. 



I have several times found this larva in company with Myceto- 

 charis; and this cii'cumstance, with its size and habits, and its resem- 

 blance to the larvse of allied genera, have led me to consider it 

 as the larva of that insect : but I have not yet been able to rear it, 

 and thus remove all doubts. 



Found under the bark of oak-ti-ees, where the wood is decayed. 



Note. — The anal prolegs in this larva and those allied to it are gene- 

 rally retracted within the abdominal segment whilst the insect is walk- 

 ing forwards, but are used when it is turning or moving backwards. 



Opilus mollis, Li7in. 

 Larva. Plate V. fig. 1 . 



Yellowish white ; above of an uniform pink colour. Head and 

 tail pitchy brown. Body 12-jointed. 



Length 6 — 7 lines. 



Head corneous, rotundate slightly depressed, rugose.^ Antennce 

 short, 4-jointed, basal joint robust and short ; second rather 

 longer, incrassated towards the apex ; third cylindrical ; termi- 

 nal slender, elongate, and Mdth a minute process at the apex f. 

 Labrum transverse, elliptical. Mandibles short and stout, uni- 

 dentate internally. Labium elongate, quadrilateral. Paljnger 

 transverse. Labial palpi 2-jointed, basal joint transverse, cylin- 

 drical; terminal elongate. M^h^mwi elongate. Maa^illce short, 

 the blade soft and fleshy, furnished with hairs internally. 



Body elongate, dilated in the middle, soft, and covered with long 

 rufescent hairs. Prothorax with a triangular coriaceous patch 

 on the disc. Telum furnished with two corneous, rugose, di- 

 verging protuberances. 



1 a. Larva, magnified. 1 h. Upper side of the head. 1 B. Under side 



of the head. 1 c. Antenna. J d. Labrum. 1 e. E. Mandibles, 



If. Palpiger. (Newm.) 1^. Labium. 1//. Insertio. (Newm.) 

 1 i, Telum. (Newm.) 1 k. Fore leg. 



* In separating this part it was injured, so that I am not quite certain whether 

 the base of the palpus is a joint or part of the palpiger. 



f This might, perhaps, be considered as a distinct joint, but it is so extremely 

 minute, and consequently so difficult to be seen, that I was induced to describe the 

 antennas as 4-jointed until I could determine by exajninlng allied larvae. 



