182 Transactions of the Society. 



The external genitalia of the male consist of a powerful two- 

 jointed pair of forceps, the lower joints of which are large, massive, 

 subglobular, while the terminal joints are small and linear, and so 

 articulated to the first as to curve inwardly between them when not 

 in use. These terminal joints of the forceps carry at their tips an 

 armature of short, sharp, scattered, horny spines. The ovipositor of 

 the female is conical, narrowing towards the acute apex ; it is con- 

 stituted of two lateral plates or valves which cover and protect two 

 very delicate, parallel, acute, membraneous spiculse. 



Speeijie Description of P8AMATHI0MYA PECTIN AT A. 



I. Head. — The head in both the male and female is of average 

 size and of the full width of the mesonotum, which projects conically 

 over it. The eyes are prominent and convex. The facets are large 

 and project hemispherically. Twelve facets occupy the whole antero- 

 posterior convexity of the compound eye, as seen from above. Ocelli 

 absent. The truncate vertex projects bluntly beyond and between 

 the eyes. The cheeks are prominent and rounded behind. The 

 anterior termination of the mesonotum reaches as far as the middle 

 of the eyes. Eyes protected by a group of 10 or 12 stout and long 

 setae or bristles, which are inserted above them as eyebrows. The 

 clypeus carries two parallel rows of distant, stiff bristles. Each 

 eye carries at its posterior lateral edge a black chitinous appendage 

 of an oblong shape and of unknown use. 



The troplii. — I have not been able to make these out to my satis- 

 faction. They are very short and consist apparently of a geniculate 

 haustellum, and of conspicuous, two-jointed palpi, the terminal joints 

 of which are rich in sensory bristles. 



The antennm in both sexes are six-jointed and much shorter than 

 the head and thorax together. 



The basal joint is the stoutest, it is broadly truncate at its apex 

 and is four times wider at this point than the base of the following 

 joint inserted into it. The apical joint is oval or somewhat pyriform ; 

 its extreme tip is slightly produced and narrowed to an obtuse point. 

 The second joint of the antennas is the longest ; then follow about 

 equal in length the first and the last joints, while the remain- 

 ing three joints are small, subglobular, and nearly equal in size. 

 The second joint, near its basal third, is constricted and slightly 

 contorted, while an indentation is also noticeable near the anterior 

 third, on the opposite side. The basal joint of the antennae is liberally 

 furnished with stout and stiff bristles, which are of the same length 

 as the joint which carries them. One or two much smaller bristles 

 show themselves frequently on the sides of the sixth joint, but all the 

 intermediate joints, namely the second, third, fourth and fifth, are 

 always without any setae, and carry nothing but a rough, short 

 inconspicuous pubescence, visible only under the Microscope. 



