USED IN ENTOMOLOGY. 61 



marked difference between the stages : specifically the Ephemerida, Odo- 



nata and Perlida. 

 Hemiptera: half -winged: an ordinal term applied to insects in which the 



mouth parts consist of four lancets inclosed in a jointed beak or rostrum; 



metamorphosis incomplete : the primaries may be of uniform texture 



throughout (Homoptera) or may be thickened at base, membranous at tip 



(Hcteroptcra). 



Hemispheric: like the half of a globe or sphere. 

 Hepaticolor: liver-brown [dragon's blood]. 

 Hepatic pouches: applied to crecal pouches; q. v. 

 Herbivorous: feeding upon plant tissue: a leaf feeder. 

 Heremetabola: with slight or incomplete metamorphosis, but with a resting 



stage at the end of the nymph life ; specifically the Cicadidce. 

 Hermaphrodite: an individual in which the characters of both sexes are 



combined. 



Hetero: as a prefix, unequal; different from. 

 Heterocera: Lepidoptera in which the antennae are of any form other than 



clubbed at tip : opposed to Rhopalocera. 

 Heterochrome: of different color: applied to species in which there are two 



color forms of one sex, one of which is like (homoeochrome), the opposite 



sex, as in certain Odonata and Lepidoptera. 



Heterochrony: an irregular development in point of time, a later stage be- 

 coming evident before one that is earlier in ordinary course. 

 Heterogamy: applied to those cases in which two sexual or a sexual and 



parthenogenetic generation alternate. 



Heterogeneous: a mixture of different forms; abnormal. 

 Heterogeny: the alternation of sexual and parthenogenetic generations. 

 Heterogyna: the ants: referring to the different kinds of females, queens 



and workers, as distinguished from males. 

 Heteromera: Coleoptera in which the anterior and middle tarsi are 5-jointed 



and the posterior are 4- jointed. 



Heteromerous: having an unequal number of tarsal joints on the feet. 

 Heterometabola: differing among themselves in metamorphosis ; but not 



manifesting abrupt stages. 

 Heteromorphous: the metamorphosis complete, in abrupt stages, the larva 



unlike the adult. 

 Heteronomous: if two parts, compared with each other, are of different 



quality : differing in development or function. 

 Heteropalpi: palpi with a different number of joints in male and female, as 



in some Trichoptera. 

 Heteroptera: an ordinal term applied to that series of Hemiptera in which 



the anterior wings differ in texture from the posterior, and the different 



regions of primaries differ in texture. 



Heteropterous: with wings of different texture in different parts. 

 Heterotypical: a genus, described from more than one species, these differ- 

 ing in structure. 

 Hexachaetous: Diptera in which the mouth structures have six piercing setae. 



