GENUS HYLOTOMA. 49 



The cocoon is double. The eggs are mostly deposited 

 in the leaf twigs in a single or double row, each egg 

 being in a separate hole. When the perfect insects are 

 not metallic blue or green they are yellowish, at least 

 in part. 



The genus is very widely distributed over the globe, 

 but more especially in the New World and in the 

 Palsearctic region. There are twenty-six species in 

 Europe. 



Synopsis of Species. 



1 (10) Abdomen luteous. 



2 (3) Legs and thorax entirely bluish-black. Pagana. 



3 (2) Legs more or less luteous. 



4 (7) Pleurae marked with yellow. 



5 (6) Legs for the greater part bluish-black, hind tarsi not annu- 



lated with black. Pagana, var. Stephensii. 



6 (5) Legs for the greater part yellow ; posterior tarsi annulated 



with black. Bosae. 



7 (4) Pleurae not marked with yellow. 



8 (9) Femora black only at the apex. Anterior wings with a fascia 



below the stigma. Cyanocrocea. 



9 (8) Femora quite black. Wings without a fascia below the stigma. 



Melanochra. 



10 (1) Abdomen black or blue. 



11 (17) Tibiae more or less white, wings mostly hyaline. 



12 (13) "Wings hyaline, without a fascia; four anterior legs black, 



posterior tibiae white. Ciliaris. 



13 (16) Wings with only a fascia below the stigma. 



14 (15) Third cubital cellule on lower side shorter than second. Sixth 



joint of maxillary palpi not double the length of fourth ; 

 wings yellowish ; tibiae and tarsi usually yellowish-white. 



Ustulata. 



15 (14) Third cubital cellule on lower side as long as, if not longer, 



than second. Sixth joint of maxillary palpi double the 

 length of fourth; wings hyaline ; nervures black ; posterior 

 tibiae pale in front, black behind. Fuscipes. 



16 (12) Wings with a fascia and a violet- fuscous blotch in radial 



cellule ; tibiae and tarsi yellowish- white, abdomen with 

 testaceous stripes on back. Atrata. 



17 (11) Tibiae entirely black, wings blackish-violaceous. 



18 (19) Third transverse cubital nervure almost straight or but very 



slightly bent ; the third cubital cellule not much longer 

 than broad. Head distinctly widened behind. 



Cceruleipennis. 



19 (20) Third transverse cubital nervure distinctly bent outwardly ; 



the third cubital cellule not wider above than beneath. 

 Head somewhat widened behind. Antenna) stout. Enodis. 

 VOL. III. 4 



