6 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 Hymenoptera ; 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: Lepidoptera; 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 Lepidoptera, used as clasp- 

 ing 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 trito- 

 cerebral ; 4, mandibular; 5, superlingual ; 6, maxillary; 7, labial or 2d 

 maxillary. 



Head vesicle: in Diptera, = 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 pirik -f chrome lemon]. 



Hemelytra: a modification of the anterior wings of Hcteroptera, 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. 



riemimeroptera: an obsolete term for Hemiptera. 



Hemimetabolous: manifesting an incomplete metamorphosis, but with a 



