E acne mis capncina and its larva. 299 



dissections and preparations as should enable me to 

 perceive the structures, especially of the head. Between 

 the two median teeth there could be seen three excessively 

 minute processes, similar to those figured by Ferris, 

 I. c, f. 2, at the side of the head, and representing 

 certainly the labium composed of a ligula and two palpi, 

 and, having detected them in the dead but quite extended 

 example, both myself and Mr. Gorham were able to see 

 them similarly situated in the living insect. They are, 

 however, excessively minute, only about half the size of 

 the minute lateral organs represented by Ferris in fig. 2 ; 

 and in a preparation of the head mounted in Canada 

 balsam they are entirely withdrawn, and can be only 

 faintly perceived through the upper surface of the head. 

 This preparation of the head in balsam shows a feeble 

 line passing across the space behind and between the 

 median teeth, and it is probable that the part in front of 

 this line may be the labrum. The minute lateral organs 

 represented by Ferris in fig. 2 are under these circum- 

 stances, I have no doubt, a maxillary lobe and its palpus ; 

 this is in accordance with the opinion previously expressed 

 by Osten-Sacken and alluded to by Ferris, in reference 

 to the larva3 of Fornax badius and orcliesoides ; Fornax 

 being a genus closely allied to Eucnemis. 



I also took ofi' a head of one of the larvge, and found 

 that it consisted of two plates — an upper and a lower — 

 quite separated from one another behind, but in front 

 so firmly soldered together that I could fracture them 

 but not separate them, and, as the outlines of these two 

 plates are in front exactly similar, they appear there as 

 if they were only one plate, and that there is no buccal 

 cavity ; on looking at the edge, however, it can be per- 

 ceived, as we might confidently anticipate, that there is 

 on each side a small orifice between the two plates at 

 the spot where the maxillae exist, and a still smaller 

 orifice (more difficult also to detect, owing apparently to 

 one of the two plates that form the upper and lower 

 surfaces of the head projecting rather more than the 

 other) in the middle of the front edge, that is, at the 

 spot where the labium can be detected protruding in the 

 living example, 



Ferris has said nothing about the mandibles; but 

 Coquerel, in the memoir and plate I have alluded to as 

 representing a larva of the allied Furnax niadayascaricnsis, 



