IS EXPLANATION OF TERMS 



culated animals with feet, that do not change their form with 



their vernantia. 



Horizontal, (wings) when at rest parallel to the horizon. 

 Horns, a word used by some writers to designate the antennae. 

 Humerus, the region of the exterior basal angle of the elytra ; 



according to Meigen it is the anterior angles of the thorax in 



Diptera. 



Hyaline, transparent; vitreous. 

 Hymenoptera, an order of insects, comprehending those with 



four membranaceous naked wings, as the bees and wasps. 

 Hypocrateriform, salver-shaped. 

 Hypostoma, that portion of a Dipterous insect which is included 



between the antennae, the eyes and the mouth ; called by some 



naturalists clypeus. 



I. 



Imago, the perfect insect, after having passed through the states 

 of larva and pupa. 



Imbricate, tiled ; placed one over another like shingles on the 

 roof of a house. 



Immaculate, destitute of spots. 



Immarginate, having no elevated margin or rim. 



Imperfect, or incomplete metamorphose, is that species of change 

 from the larva to the imago, in which the feet and wings of 

 the pupa are immoveable, as in the Coleoptera, Lepidoptera, 

 &c. 



Incanus, hoary. 



Incisure, or suture of the abdomen, is an impressed transverse 

 line, marking the juncture of two segments. 



Inclining, leaning. 



Inconspicuous, not readily discernible. See obsolete. 



Incrassated, thickened, swelled out at some particular part. 



Incumbent, resting against; one lying over the other; (wings) 

 which, when the insect is at rest, cover the back of the abdo- 

 men horizontally. 



Incurved, bowed inwards. See recurved. 



Indurated, hardened. 



Inequal, unequal ; with irregular elevations and depressions on 

 the surface. 



Inferior wings, those that are farthest from the head, otherwise 

 called posterior wings ; they are generally smaller than the 

 superior or anterior wings ; many are provided with hamuli. 



Inflected, bent inwards at an angle. 



Infracted, bent inwards abruptly, as if broken. 



