1. PACHYGASTER 67 



cubital vein, and by its clear wings, black femora, and touching 

 eyes of the male, 



(J . Head broad and flattened, being nearly twice as wide as deep when viewed 

 from in front, and a little longer tlian deep in profile ; face and frons shining 

 black and small, unless seen from below ; frons with a deep longitudinal 

 channel ; face with short pale grey pubescence near the eyes and with broad 

 side-cheeks ; jowls broad but shalloAv, shining black, and clothed with rather 

 abundant dark brownish pubescence which becomes longer and is whitish 

 grey behind the mouth opening ; the jowls pass on to the distinctly inflated 

 lower part of the back of the liead ; upper half of the back of the head not in 

 the least inflated, but on the contrary rather sunken and with_ no apparent 

 pubescence ; vertex bare, shining black, long and narrow, extending fully half 

 way from the occiput to the antennae, and leaving the eyes touching for a 

 long space (eight or ten facets) almost down to the antennai ; ocelli slightly 

 raised, but the ocellar triangle practically bare. Eyes in profile very short 

 ovate, being rather longer than deep and with a slight angle between the 

 lowls and the beginning of the back of the head ; facets on the lower two-fifths 

 "smaller than those on the upper three-fifths, and with the straight dividing 

 line rather sharply defined ; in dry specimens the large facets are usually light 

 brown and the small facets more or less black brown except against the margin 

 of the eye. Antennae dull brownish black, placed below the most forward 

 part of the head ; arista shorter and less thin than in P. atra. 



Thorax shining black, but a little dulled by the dense minute punctuation 

 and the very minute adpressed grey pubescence ; pleurae more shining because 

 they are less punctate, and the sternopleurae with more obvious light grey 

 pubescence ; prothorax with almost a tuft of minute whitish grey pubescence. 

 Scutellum similar to the hind part of the thorax, rather elongate, and with a 

 transverse channel well before the tip. 



Abdomen short ovate, being broader than long and considerably broader 

 than the thorax, brightly shining black, sparsely punctate, and with incon- 

 spicuous though not scarce rather erect but very short dark grey pubescence, 

 which becomes rather longer about the basal corners. Belly shining black, 

 with rather sparse adpressed minute but fairly conspicuous whitish grey 

 pubescence. Genitalia small, protruding from the middle of the hind margin 

 of the fifth segment, and consisting of two narrow small blackish brown 

 lamella} and a shorter stouter middle piece which is reddish brown on the 



middle of its base. , . i i 



Legs dull luteous ; coxae, trochanters, and femora blackish brown, except at 

 the extreme tip of the femora ; hind tibiae rather browned, and the tips of the 

 four last joints of the anterior, and the three last joints of the hind, tarsi 

 slightly darkened above. Pubescence very slight, but there is a slight pale 

 fringe behind the front femora, and a more distinct darker fringe behind 

 the middle femora; hind femora almost bare. 



Wings almost hyaline, but with the subcostal cell and the stigma opaque 

 pale greyish yellow ; cubital vein short and up-curved, without any sign of a 

 fork (fig. 91) ; subsequent veins very pellucid. Squamai blackish brown, with 



Vie. ^l.—Pachygaster minutissima $. x 20. 



dark grey fringes. Halteres blackish or brownish, with the upper part of the 

 large knob usually brownish yellow or sometimes even dirty whitish. 



Very much like the male. Frons bare, shining black and broad being_ nearly 

 half the width of the head at the top and more than one-third its width at 

 its narrowest part which is just above the antennae ; down the middle there 



