CLASSIFICATION OF THE RHYNCHOTA 483 



Rostrum stout, bent at base so that it does not lie against the 



under surface of the head . . r. .....:. ......,, ,..., ,:.. r .. ,^- 9 



6. Antennae generally elongate, and four-jointed, inserted on the 



upper parts of the sides of the head ........ 7 



Antennae inserted below a line drawn from the course of the 



eye to the apex of the face ......... 8 



7. Legs of moderate length, apices of femora not nodulosely 



clavate .. . ,. . ,, v - . ; . . : .. . . Coreidae. 

 Legs long and slender, apices of femora nodulosely clavate . Berytidae. 



8. Ocelli present . . ...... . . . Lygaeidae. 



Ocelli absent ... . Pyrrhocoridae. 



9. Rostrum long, ocelli placed between the eyes . . . Saldidae. 

 Rostrum short, ocelli when present placed behind the eyes .... 10 



10. Hemielytra complete, membrane distinct .... Reduviidae. 

 Hemielytra entirely membraneous Heniocephalidae. 



1 1 . Anterior legs normal : . . . . . . 12 

 Anterior legs short and stout, with long coxae, short thick 



femora, and curvate pointed tibiae, frequently without -tarsi Phymatidae. 



12. Hemielytra more or less reticulate, consisting of strong irre- 



gular thick lines, forming a framework of cells. Anterior 

 legs inserted on the posterior margin of the prosternum . Tinjjididae. 

 Hemielytra neither reticulate nor cellular, anterior legs in- 

 serted on the disc of the prosternum Aradidae. 



13. Hemielytron with an embolium 14 



Hemielytron without an embolium Capsidae. 



14. Ocelli absent Cimicidae. 



Ocelli present . . . . . . .15 



15. Antennae long and thin, clothed with long hairs, third and 



fourth joints together twice as long as first and second. . Ceratocombidae. 

 Antennae not very thin, nor clothed with long hairs, third and 



fourth joints not nearly as long as first and second . . Anthocoridae. 



16. Antennae five-jointed Hebridae. 



Antennae four-jointed Hydrometridae. 



The two families Aepophilidae and Polyctenidae are not included 

 in the above key ; the former are of no practical importance. The genus 

 Polyctenes contains a few species which are parasitic on bats. 



Distant gives the following Key to the families of the Cryptocerata : 



1 . Body short and broad ; head very broad with prominent eyes ; 



ocelli present. Posterior legs thin, formed for running . Pelogonidae. 

 Body elongate or ovate ; head of moderate size . ... 2 



2. Anterior legs inserted on disc of anterior margin of pro- 



sternum : . . . . . . , * 



. .'..... Anterior legs inserted on the posterior margin of prosternum . . ,. 5. 



3. Antennae with four joints; no anal appendage . ... .4 

 Antennae with three joints, abdomen with a long tubular 



appendix . . . !~&k *. ' > Napidae. 



4. Posterior tibiae spinulose .^. . .,.-_.. .-, >> < Naucoradidae. 

 Posterior tibiae flattened and provided with swimming hairs. Belostomatidae. 



5. Rostrum free, three to four-jointed '. '"V ' ' V- . . Notonectidae. 

 Rostrum concealed, apparently unjointed . " .: , - . Corixidae. 



