COLEOPTERA. 



DIAPERIDTE. 



315 



{Fig. 37. 13. represents the under side^of the head ; 37. 14. front of the 

 head on the upper side; 37. 15. labrum ; 37. 17. maxilla ; and 37.18. 

 labium of this larva). The pupa {fig. 37. 21.) is broader, with the 

 abdomen also terminated by two larger acute diverging points, and the 

 lateral margin of the abdominal segments provided with minute setose 

 tubercles. 



Dr. Hammerschmidt has figured the larva of Diaperis boleti in his 

 work De Insectis AgriculturcB daninosis, S^c. plate 1., but in a very 

 unsatisfactory manner; it is represented as long, cylindrical, and 

 furnished with six legs. I have also discovered under the bark of 

 elm trees in Kensington Gardens, in company with Hypophla?us 

 bicolor (fig. 38. 5.), specimens of a small larva (fig. 38. G.) which I 



vlj- 1 



^ r 



have no doubt are those of that species, having the body of a whitish- 

 buff colour, considerably narrower than that of Diaperis aenea, sub- 

 convex above, concave beneath, with the legs short ; the terminal 

 segment of the body small and entire, and the other segments of the 

 body furnished with a few long hairs. Fig. 38. 7. represents the maxilla 

 of H. castaneus. Bouche has described and figured the larva (fig. 38. 

 4.) of Boletophagus agaricola (^^. 38. l.) ; it is elongate, semicylin- 

 drical, somewhat curved, and narrowed behind ; the head rounded ; 

 the antennae 4-jointed ; the terminal segment small, rounded, and 

 entire ; the legs six in number, and short, as well as the anal proleg. 

 It resides, as well as the perfect insect, in Boleti {Nafurg.de?- Ins, I. 

 p. 191. pi. 9. f. 7.). Figure 38. 2. represents the maxillary palpus; 

 and 38. 3. one of the antennae of the perfect insect. 



The genus Trachyscelis (fig. 37. 22. Tr. aphodioides) Latr. is re- 

 mai'kable for its very short antennae, terminated by a 6-jointed oval 

 club (^g. 37. 25.) ; the tibial are broad, triangular, and spinose, formed 



