270 



C. B. WILLIAMS. 



Colour pale yellowish brown, the sides of the head posteriorly and the abdomen, 

 except for the last three segments, a little darker. Wings pale yellowish with two 

 small dark areas. Pigment round the ocelli red. Antennae rather darker than 

 the body ; legs hghter. 



Head (fig. 1 a) about as long as wide ; sides of the head not arched, more or less 

 parallel. Eyes large, but not projecting. Distance between the eyes about one and 

 a quarter* times the width of the eye ; distance from the eye to the back of the head 

 about equal to the length of the eye. Ocelli far back on the head, the posterior pair 





Fig. 1. Diarthrothrips coffeae, Williams, sp. n. ; a, head and prothorax ; 



b, maxillary palp ; c, antenna ; d, forewing ; e, antenna of larva ; 



/, antenna of Aeolothripid larva. 



on a level with the hind margin of the eyes ; the three forming an equilateral triangle. 

 A pair of long slender ocellar spines on the sides of the triangle rather nearer the 

 anterior ocellus, a shorter pair more anterior (one near the margin of each eye), and 

 two quite short ones near the median line on the frons. There is also a row of about 

 six short slender spines across the head behind the eyes. The hind part of the head 

 is faintly striated. Mouth-cone rather long and bent downwards ; when, in mounted 

 specimens, it is pressed against the prosternum it reaches to the hind margin of it. 

 Maxillary palps (fig. 1 6) two-segmented, the apical segment the longer. Labial 



