204 Journal New York Entomological Society, t^'"'- >^>^iv, 



between the mesothorax and the propodeum or first abdominal seg- 

 ment. The true metanotum (here called the post-scutellum) is a 

 very narrow transverse plate, slightly wider in the middle than at 

 each side where there is a wide lateral plate extending forward to 

 the hind wing. The metanotum is rather well punctured and pilose. 

 The metapleuron consists of two plates, the upper larger one extend- 

 ing from the base of the hind wing to the mesocoxa, being situated 

 somewhat anterior to the lower one which is small and bears the 

 hind leg. The upper plate is elongate and oblong, the upper portion 

 being wider than the lower one. In front it articulates with the lower 

 plate of the epimeron and below this with the posterior margin of 

 the episternum. Its hinder margin articulates with the propodeum. 

 The lower plate is very small and is triangular in form. The ante- 

 rior extension of the triangle passes between the propodeum and the 

 middle coxa to the lower end of the upper metapleural plate; the 

 lower one passes between the middle and hind coxa and fuses with 

 the metasternum; the third passes backward for a short distance be- 

 tween the hind coxa and the propodeum. The metasternum is a small 

 trapezoidal plate whose anterior portion is convex and posterior por- 

 tion concave. 



The propodeum is the true first abdominal segment and it bears 

 a spiracle on each side. The spiracles are elongate and curved ante- 

 riorly. The propodeum consists of a notal plate which has become 

 firmly joined to the metathorax while its ventral plate has been en- 

 tirely lost. It is divided into a median area and two lateral ones by 

 two fine, curved ridges which meet on the lower margin. The median 

 area has a median longitudinal ridge extending from its upper to its 

 lower margin. The lateral areas are large and a little depressed 

 about the spiracles. There are few punctures on the median area 

 though there may be considerable pilosity on the sides. 



Abdomen. 



The number of segments of the abdomen is six in the female and 

 seven above in the male (not counting the propodeum as an abdomi- 

 nal segment). The abdomen is well punctured and pilose, especially 

 along the sides. 



The dorsal sclerite of the so-called first segment is much the 

 largest. Its large triangular anterior face extends downward and 



