230 GENUS BLENNOCAMPA. 



secondary sexual characters is tliat in one group 

 (lineolata) the transverse median and recurrent nervures 

 are situated along the edge. 



The larvae are short and thick compared to their 

 length ; in shape they are either cylindrical or flat ; in 

 the latter case the body is much broader before than 

 behind, and is covered with a slimy secretion. The 

 cylindrical larvae have either bare bodies, or bodies 

 covered with long or short, branched, or simple spines. 

 A cocoon is spun in the earth. 



By some authors Blennocampa is split up into three 

 genera. Blennocampa distinguished by having no 

 middle cellule in hind wing ; Monopliadnus by having 

 one middle cellule ; and Pliymatocera (= Pectinia) by 

 its long pilose antennas, which have the third joint 

 shorter than the fourth, the reverse being the case 

 with the other species. I have not, however, adopted 

 Monopliadnus and Phymatocera. From Selandria the 

 structure of the lanceolate cellule and the neuration 

 in the hind wings readily separate it ; from Hoplocampa 

 the same characters distinguish it. Its affinities are 

 undoubtedly strongly with Fenusa, from which, apart 

 from its having four cubital cellules, it is very difficult 

 to point to any other absolute marks of distinction, and 

 the difficulty of doing so is further increased by the 

 first transverse cubital nervure in B. nana and B. 

 betuleti being almost obsolete at least in the middle. 



The species of Blennocampa have a very wide range, 

 being abundant in the Palsearctic and Nearctic regions, 

 rarer in the Oriental and Australian, and not uncom- 

 mon in the Neotropical. There are more than fifty 

 European species, while thirty-two have been described 

 from North America, the greater number belonging to 

 the subgenus Monopliadnus. The neotropical genus 

 Waldhcemia is very closely related to the latter, with 

 which it agrees in the neuration, but differs in having 

 the coxae very large and the antennae densely pilose, 

 thickened in the middle, and with the four last joints 

 abruptly shorter. 



