Feb., 1905.] Nerthra stygica. 289 



beyond the costal margin ; extending beyond the end of the abdo- 

 men. First pair of legs raptorial. Anterior femorae incrassate, 

 flattened anteriorly and coming to a point (Fig. 2) ; coarsely 

 granulate; tarsal claws single. Intermediate and posterior 

 pedes cursorial ; femorae normal with a row of blunt teeth ; tibiae 

 with two rows of stout spines with a sulcus between; tarsi one- 

 jointed in intermediate pedes and provided with double claws 

 (tarsi of posteriors lost in the specimen before me). Mesosternal 

 tubercle rather acute and laterally somewhat flattened, ter- 

 minated by bristles. Male abdominal segments much com- 

 pressed in the middle to give room for the large and prominent 

 genital segments which are deflected toward the right. Abdomen 

 rounded with an entire margin. 



Color, blackish-brown above, except the flattened prothoracic 

 and hemelytral lobes which are yellowish and translucent. 

 Underside of the abdomen more or less black. First pair of legs 

 entirely black; second and third more or less spotted with 

 lighter color. 



Dimensions: Insect — Long., 7 A mm.; lat., 5.3 mm. Head 

 including eyes — Long., .6 mm. ; lat., 3.4 mm. Prothorax — Long., 

 2.4 mm. ; lat., 5 mm. Abdomen — Long., 4.4 mm. ; lat., 5.3 mm. 



Redescribed from a single specimen in the collection of Mrs. 

 Annie Trumbull Slosson who took it in Florida. 



The much roughened upper surface together with the entirely 

 coriaceous hemelytra fused into one will at once distinguish this 

 species from all the other Mononychinae. 



The preceding descriptions will doubtless be found lacking in 

 manv respects but dissection being necessary to determine cer- 

 tain anatomical features and characters, such, for instance, as 

 the antennae, the possession of only one specimen, and that not 

 my own, has made it impossible to supply what is missing. 



As Say's description is not accessible to all, I give it hereafter 

 taking it from the Le Conte edition. 



"N. stvgica — Black, front quadrilineate. 



"Inhabits Georgia. 



"Bodv oval, brown-black, rather rough; head crenate on the 

 front so as to form four denticulations ; eyes rounded, rather 

 prominent; thorax not emarginate before, with a slightly de- 

 pressed margin behind; anterior thighs dilated triangualr; 

 hemelytra with oblique lines; they appear united at the suture. 



' 'Length three-tenths of an inch. 



' 'I have but one mutilated specimen which was sent to me by 

 Mr. Oemler. If I am not deceived by this specimen, the species 

 is apterous and the hemelytra are united by a rectilinear suture, 

 which will require the formation of a separate genus which may 

 be named Nerthra." 



