Fig. 2. 
Fig. 3. 
Fig. 4. 
Fig. 5. 
Fig. 6. 
Fig. 7. 
Relationships existing amongst Natural Objects. 421 
Adelotopus Ipsoides, Westw. 2 a. Upper side of the head. i. and i. re- 
presenting the gene visible from beneath. 2 5. Underside of 
the head. a. The situation of the articulation of the mentum. 
e. Mentum. d. Jugulum. f. Maxillary palpus, the base of the 
maxilla concealed by the side of the mentum. 7. The im- 
mensely developed gens. c. The canal for the antenne, g. 
Sphallomorpha decipiens, Westw., and details. 
3a. Front of head above, with the mandibles and labrum. 
3 b. Underside of the head. a. A very indistinct line, terminating on 
each side in a slight notch and bristle, and indicating the ordi- 
nary place of the articulation of the mentum. F. A deep canal 
for the action of the base of the maxilla f., and separated from 
the outer canal c. (formed for the reception of the antennæ g.) by 
an elevated ridge i. d. Jugulum. e. Mentum. 
3c. Maxilla. 3d. Labial palpus. 3e. Underside of anterior tarsus. 
Silphomorpha fallax, Westw., and details. 
4a. Front of head, above, with the mandibles and labrum. 
46. Underside of the head, exhibiting no traces of the ordinary arti- 
culation of the mentum, which here forms a component part of 
the skull. | 
4 c. Marilla. 
4 d. Underside of the thoracic segments, showing the acuminated pro- 
sternum (*) and the small size of the metasternum (**). 
Rhyzopertha pusilla, Steph., and details. | 
5a. Labrum. 56. Mandible. 5c. Maxilla. 5 d. Instrumenta labi- 
alia. 5e. Antenna. 5f. Fore tibia and tarsus. 
Tomicus fuscus, Marsh., and details. 
6a. Mandible. 65. Maxilla. 6c. Mentum and labial palpi. 6d. An- 
tenna. 6e. Fore tibia and tarsus. 
Condylodera Tricondyloides, Westw., and details. 
7 a. Front of head. 7 b. Mandible. 7c. Maxilla. 7 d. Instrumenta 
- 
labialia. 
