1 88 The Orders of Insects 



tubercle laterally, and the terminal is clui)-shaped ; they are inserted 

 high up on the head. The membrane of the forewing is traversed 

 by several longitudinal nervures. The bugs of this family live by 

 sucking the juicL'S of plants, and have as wide a range as the 

 Pentatomida". 



Berytidae. — The BerytiJa: are a small family of bugs which share 

 most of the structural features of the Coreida:, but are distinguished 

 by their slender form and very long feelers and legs. The basal 

 segment of the feelers, and the thighs are clubbed at the tip. 



Lygaeidae. — The Lygitidu: are a very large family ot bugs. The 

 four-segmented feelers are inserted lower on the head than in the 

 Coreids. As in that family there are three tarsal segments, and 

 the beak when in repose lies against the lower surface of the head. 

 Two ocelli are present except in the large sub-family Pyrrhocorinse. 

 The membrane of the forewing has not more than five nervures ; 

 the only hardened areas, as in the preceding families, are the corium 

 and clavus. The bugs of this family are plant-feeders, and are 

 distributed in all parts of the world. 



Tingididae. — The TingidiJa: may be distinguished from the pre- 

 ceding families by the presence of only two tarsal segments instead 

 of three, as well as by the rem;irkable net-like puncturation of the 

 upper surface of the body and of the forewing, in which the clavus 

 is usually wanting. The second segment of the feeler is very short, 

 and the third very long. The base of the pronotum is usually 

 produced backwards so as to cover the scutellum, and the front legs 

 are inserted in the hind margin of the prosternum. 



Aradidse. — The Aradida: agree with the Tingidids in their two- 

 segmented feet, but the surface is not similarly punctured ; the 

 pronotum does not cover the scutellum which is large, and the 

 front legs are inserted midway on the prosternum. The family is 

 small, containing but few genera. 



Hebridae. — The Hebridcv are a small family of tiny bugs, living in 

 pond-weed, bog-moss, and sirrilar damp situations, in correspon- 

 dence with which their hind-body is covered with short hairs 

 forming a thick velvety pile. The feelers are five-segmented, and 

 inserted far in front of the eyes and rather low on the sides of the 

 head, and the feet are ten-segmented. The family contains but a 

 single genus (^Hebrus'). 



Hydrometridae. — The Hydrometridj; or Pondskaters are another 

 large family of bugs which live for the most part on the surface of 

 water. Like the Hebrids they have a velvety pile on the hind- 

 body, but there are only four antennal segments. There may be two 

 or three tarsal segments. The forewings are peculiar in not show- 

 ing divisions into the areas — corium, clavus, etc., usual in the 

 sub-order: they are traversed by a simple system of nervures. The 

 insects of this family feed on smaller aquatic creatures, or on floating 

 waste-material. They are distributed throughout the world, and 

 several genera are marine (170, 171)- 



