HEMIPTERA HETEROPTERA. 69 



a little acute tubercle behind the eyes; 

 ocelliferous part not elevated. First joint 

 of the rostrum extending nearly to the 

 middle of the eyes; second more than twice 

 the length of the first. Antennae genicu- 

 lated ; first joint somewhat thick. Anal seg- 

 ment of the female elongated, bilobed. Fore 

 femora thick, with a spine beneath towards 

 the tip. 



A. Tylus compressed, lengthened, porrect, 



acute, distinct from the upper apical 

 process. Head, prothorax and the border 

 of the abdomen unarmed. Side angles of 

 the prothorax prominent, not rounded. Fore 

 wings much shortened. - - - Dicrotelus. 



B. Tylus elongated into a compressed spine, 



which touches the upper apical process. 

 Head above, prothorax and border of the 

 abdomen with little spines. Each side angle 

 of the prothorax elongated outward into a 

 spine; hind angles elongated and rounded 

 backward. Fore wings extending to the tip 

 of the abdomen ; both areolets emitting a 

 vein from the outer apical angle ; the vein 

 closing the hind areolet hindward abbre- 

 viated. .--.- Nvllids. 



Subfam. 2. ECTINODERIDA. 



A. Prothorax much elongated hindward and 



extending beyond the tip of the sculellum. 

 Fore tibiae above with a groove for the 

 reception of the joints of the short tarsi. 

 Claws, at least the bind pair, toothed or with 

 appendages. - Diaspidius. 



B. Thorax not extending hindward beyond the tip 



of the scutellum. Fore tibia? with no apical 

 furrow. Fore tarsi incrassated, not or hardly 

 shorter than the hind tarsi. Claws simple. 



a. First joint of the antennae longer than any of 



the others, somewhat longer than the head ; 



second joint shorter than the first. - Ectixoderus. 



b. First joiut of the antennae shorter than any of 



the others, less than half the length of the 

 head ; second joint longest of all, thrice the 

 length of the first. - - Amulics. 



Subfam. 3. SALYAVATIDA. 



A. Fore tibiae at the tips above with no oblong 



femora for the reception of the tarsi. 

 a. Fore tibiae dilated aud leaf-like on each side. - Petalochirus. 



