422 SYNOPTIC COLLECTION. 



has a long body and long legs like the walking-stick of 

 the Orthoptera, and the wings are reduced in size, while 

 in Hygrotrechus (No. 1044), an insect that lives on the 

 surface of the water, the wings have disappeared. 



In striking contrast to .these long-bodied and long- 

 legged Hemiptera is the Galgulus oculatus Fabr. (No. 

 1045), which inhabits marshes. On account of its short, 

 broad body and projecting eyes it is often called the 

 toad-shaped bug. It is a good leaper and its color har- 

 monizes with its surroundings. 



The terrestrial Hemiptera are well represented by the 

 squash-bug, Anasa tristis De Geer (No. 1046, eggs, larva, 

 pupa, adult; No. 1048, adult). In the larva (No. 1046; 

 PI. 1047, fig. i) the thoracic segments are unequal in 

 size, although they are freely movable. The head, an- 

 tennae, and legs are dark-colored, presenting a striking 

 contrast to the light-colored body and indicating that 

 these appendages perform hard labor. The posterior 

 lateral angles of the mesothorax and metathorax grow 

 out (No. 1046) until the distinct wing pads of the pupa 

 (No. 1046 ; PI. 1047, fig- 2 ) are formed. One can often 

 find all the stages of the developing wings in the squash- 

 bugs that infest a single plant. 



The prothorax in the adult (Nos. 1046, 1048; PI. 1047, 

 fig. 3, /) has grown backward and covered the larger 

 part of the mesothorax, which is also seen in PI. 1047, 

 fig. 4, where the prothorax (/) is raised exposing the 

 mesothorax (ms) ; the latter is large and its posterior part, 

 the scutellum, conceals the dorsal part of the small nar- 

 row metathorax (fig. 3, mt). 



The jointed sucking tube (fig. 3, su ; No. 1048, with 

 tube extended) is essentially the same in the larva and 

 adult. It is seen in fig. 5, where the bristle-like mandi- 

 bles and maxillae are drawn out of the tube or second 

 pair of maxillae (fig. 5, mx"). 



The distinctive characters of the wings of Anasa and 

 of the Heteroptera generally are well seen in fig. 3. The 



