290 



HOUGH. 



black head, antennae, and legs ; palpi yellow at base, and brown 

 or black toward apex, the relative amount of black varying 

 much in different specimens. In a:^iirea the antennae are 

 inserted at the middle, in chrysorrJioca ventrad the middle of 

 the head ; the front of azurca is only half as broad as that of 

 ckrysorrhoca. The female of cJirysorrhoca resembles the male, 

 except for the usual sexual differences. The female of azurca 

 is golden green, the thorax thickly white pollinose and with 

 three blackish stripes, the abdomen whitish pollinose in certain 

 lights. Front broad. I have compared my American with 

 European specimens from Prof. G. Strobl and Dr. O. 

 Schmiedeknecht. 



