USED IN ENTOMOLOGY. 6 1 



marked difference between the stages; specifically the Ephemerida, Odonata 

 and Perlidcc. 



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 through- 

 out ( HoDWptcra) or may be thickened at base, membranous at tip (Heler- 

 optcra ). 



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 com- 

 bined. 



Hetero: as a prefix, unequal; different from. 



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

 clubbed at tip : opposed to Rhopalocera. 



Heterochrome: of different color: ai^plied to species in which there are two 

 color forms of one sex, one of which is like (homoeochromej, 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 unec|ual number of tarsal joints on the feet. 



Heterometabola: differing among themselves in metamorphosis: but not 

 manifesting abrupt stages. 



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

 unlike the adult. 



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

 ity ; ditfering 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 dift'erent texture in dilTcrent parts. 



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

 in structure. 



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



