60 EXPLANATION OF TERMS 



Hamuli: Odonata; one or two pairs of hooked processes projecting from 

 the ventral surface of the 2d abdominal segment of the male; usually 

 termed genital hamules : in Hymcnoptcra; minute hooks on the anterior 

 margin of secondaries used to unite them in flight with the inner margin 

 of primaries: in tree crickets, hook-like processes of the male genitalia. 



Hamus: Lcpidoptera; a hook or loop attached to the under side of costal 

 margin of primaries near base, to receive the frenulum of male moths. 



Harpago -ones: the inner basal lobes of the clasping organs of <$ culicids : 

 also, more generally = harpes. 



Harpes: the lateral pieces of the male genitalia in Lcpidoptera, used as 

 clasping organs : also applied to the corneous hooks often borne by these 

 lateral pieces, which are then termed valves : see clasper : in culicids an 

 articulated process, sometimes jointed, at the base of inner side of side- 

 piece, below and exterior to the harpagones. 



Hastate: halbert-shaped : excavated at base and sides but with spreading 

 lobes or angles. 



Hastiform: = hastate. 



Hatched: closely marked with numerous short, transverse lines. 



Hatching spines: = egg burster; q. v. 



Haustellate: formed for sucking: applied chiefly to mouth structures. 



Haustellum: a sucker: applied to that portion of the mouth of a sucking 

 insect through which liquid food is drawn into the gullet. 



Head: the first or anterior region of the insect body, articulated at its base 

 to the thorax, bearing the mouth structures and antennae. It is now 

 believed to be made up of seven primitive segments, named in order: 1, 

 the ocular or protocerebral ; 2, the antennal or deutocerebral ; 3, second 

 antennal or tritocerebral ; 4, mandibular ; 5, superlingual ; 6, maxillary ; 

 7, labial or 2d maxillary. 



Head vesicle: in Diptcra, = ptilinum; q. v. 



Heart: the dorsal vessel or tubular structure divided into chambers, lying 

 just beneath the dorsum, which serves to propel the blood and controls 

 the circulation. 



Heautotype: = autotype; q. v. 



Helcodermatus: a surface with ulcer-like depressions: applied also to the 

 boring or tearing spines of pupae. 



Heliciform: in the form of a spiral snail shell: applied to the cases of some 

 Trichoptera. 



Helocerous: with clavate antennae. 



Helvolus: tawny or dully reddish yellow. 



Helvus: honey yellow [brown pink + chrome lemon]. 



Hemelytra: a modification of the anterior wings oi'Heteroptera, coriaceous 

 at base, membranous at tip, not meeting in a straight line at the middle : 

 more specifically applied to the corium ; q. v. : also used for the tegmina 

 of Orthoptera. 



Hemi: as a prefix, means half. 



Hemimeroptera: an obsolete term for Hemiptera. 



Hemimetabolous: manifesting an incomplete metamorphosis, but with a 



