562 



j)arts are pale dusky yellow; metallic green of abdomen confined to the 

 three apical segments shading into piceous on the two preceding segments 

 and finally into the yellow of the basal half; antennae pale brownish 

 yellow, the flagellum slightly darker; wings as in the female. 



Fig. 4. Ootetrnsticlms formosanus, male. 



Head somewhat similar in shape to that of female but softer and 

 shrinking more after death; in life the upper part of the head is much 

 thinner fronto-occipitally than in the female, the frontovertex convexly 

 protuberant and very much wider than long, its anterior margin as 

 seen from above somewhat concave between the eyes and separated by a 

 sharp angle from the face; ocelli nearly in a straight line, the anterior 

 one being but slightly advanced in front of the lateral pair and close 

 to the angle bounding the upper limits of the face so that the frons 

 is practically absent, the lateral ocelli about equidistant from each 

 other and the nearest eye-margin; eyes considerably less than one-half 

 as large as in the female but nearly of the same shape ; cheeks; 

 rather longer than the diameter of the eye, nearly as wide as long a« 

 seen from the side; face convex below the antennae and hollowed out 

 above them to form a large common scrobe. 



Fig. 5. Antenna of male Ootetrastichus formosanus. 



