64 EXPLANATION OF TERMS 



Humeral carina: in Coleoptera, an elevated ridge or keel on the outer anterior 

 angle of elytra. 



humeral cross-vein: (Comst.) ; extends between the costa and sub-costa close 

 to base. 



Humeralis: Coleoptera ; when the elytra has an angulated projecting margin 

 at base. 



Humeral stripe: in Odonata, covers the humeral suture. 



Humeral suture: in Odonata, runs from just in front the base of the fore- 

 wing to the edge of the median coxa, separating the mesepisternum from 

 the mesepimeron. 



Humeral veins: in Lepidoptera, secondary veins on posterior wings of Lasio- 

 campids, developed to strengthen the humeral angle. 



Humerus: the shoulder: in Coleoptera; the basal exterior angle of elytra: 

 in Diptcra. the anterior superior angles of the mesothorax : in Orthoptera, 

 the femur of the fore-leg: in Hymenoptcra, applied to the sub-costal vein in 

 some groups. 



Humid: applied to regions in which the normal rainfall is sufficient to pro- 

 duce ordinary farm crops without irrigation : see arid. 



Hyacinthine: the purple blue of the hyacinth [between mauve and lilac]. 



Hyaline: vitreous: transparent or partially so. 



Hyaloplasm: the clear, semi-fluid material between the meshes of the cell 

 reticulum. 



Hybrid: the progeny from the mating of two species. 



Hydradephaga -ous: applied to aquatic, predatory pentamerous beetles with 

 filiform antennae : see adephagous. 



Hydro: relating to water: a combining form used as a prefix. 



Hydrolysis: the chemical decomposition of a compound by water, causing 

 formation of a new compound. 



Hydrophilous: applied to species living in low, damp places. 



Hymen: a thin plane membrane serving as a partition. 



Hymenoptera: membrane-winged: an ordinal term applied to insects with four 

 membranous wings with few veins, the anterior usually larger than the 

 posterior; mouth mandibulate ; head free; thorax agglutinate, transforma- 

 tions complete. 



Hyoid: having the form of the Greek upsilon, T. 



Hypermetamorphosis: when an insect passes through more than the normal 

 number of stages ; the interpolated stages coming usually between the full- 

 grown larva and adult. 



Hyperparasite: is a form that is parasitic upon another parasite. 



Hypertely: beyond the bounds of the useful: those forms whose resemblance 

 to other objects is closer than needful, or without apparent object. 



Hypertrigonal space: = supra-triangular space; q. v. 



Hypertrophied: abnormally large or excessively developed. 



Hypnody: lethargy; a condition similar to or identical with hibernation. 



Hypertrophy: any abnormal enlargement or excessive development. 



Hypoblast: = entoderm. 



Hypocrateriform : salver-shaped. 



