Invertebrate Gallery of the Indian Museum. 93 



Family gth, the gnat -like May-flies (Ephemeridge) the 



larvae of which are aquatic. Specimens of 



May-flies, along with an enlarged drawing of 



an aquatic larva, are shown in Case 78B. 



The loth Family represented is that of the Libelluiidae 



or Dragon -flies (Case 78C) the larvae of which also are 



aquatic. These three families, — Termites, May-flies, and 



Dragon-flies have both pairs of wings, when present, 



thin and membranous like those of the Neuroptera^ and 



are hence known as Pseudoneuroptera. 



iii. HEXAPODA NEUROPTERA. 

 [OTasc 79.^]. 

 Insects usually with biting mouth-parts and with thin 

 membranous wings. Metamorphosis "complete^'. The 

 Ant-lions in Case ygA represent this Order. The larval 

 ant-lion, a specimen of which, along with a much-enlarged 

 drawing, is shown, digs little funnel-like pits in the sand, at 

 the bottom of which, in concealment, it lies in wait for prey. 



iv. HEXAPODA STREPSIPTERA. 



This small Order of degraded parasitic insects is re- 

 presented by specimens and enlarged drawings of Stylops 

 in Case 88B showing the larva ; the male, with contorted 

 rudimentary forewingsand well developed hindwings; and 

 the maggot-like wingless and legless female. The larvae 

 and the maggot-like females live as parasites within he 

 abdominal cavity of wasps and humble-bees. It should be 

 mentioned that by some modern entomologists the Strep- 

 siptera are regarded as an aberrant family of Coleoptera 

 (Beetles) approaching the Cantharidx. 



V. HEXAPODA HEMIPTERA. (Rhynchota). 

 [(Eits^s 79f-80(!l]. 

 Insects with the mouth-parts usually modified for pierc- 

 ing the integument of animals and plants and sucking 



