i88i.] 273 



This genus is very nearly allied to AUceorhynchas, Fieber, Eur. 

 Hem., p. 159, but may be readily separated from it by the differences 

 in the pronotum, legs, and elytra, the former, in the present genus, 

 not being constricted beyond the middle, the next having the 2nd pair 

 of thighs incrassated, and the last being constricted before the middle. 



Arachnocoris albomaculatus. 



Elongate. Head and antenna brown, base of the 2nd and 3rd joints of the latter 

 narrowly pale, apical half of the 4th slightly paler than the basal half. Prono- 

 tum pitchy-black, very much deflected towards the head, finely punctured, 

 except two callosities behind the collar ; posterior angles slightly elevated ; 

 posterior margin deeply concave across the scutellum ; extremities rounded. 

 Scutelhtm pitchy-black, with a semicircular depression at the base ; apex white, 

 slightly elevated. Claims and corium pitchy-black, shining, having a steel-blue 

 appearance in certain lights, the latter constricted from before to beyond the 

 middle, and with a white triangular patch ; apex white : membrane brown. 

 Legs pitchy-brown : thighs : 2nd pair incrassated with two rows of short teeth 

 on the apical half of the lower margin. Abdomen pitchy-brown. 



Head — crown brown, convex, with a faint transverse channel in front, of the ocelli. 

 Antenna brown, sparingly clothed with short hairs ; 1st joint projecting its 

 entire length before the head, base of the 2nd and 3rd narrowly white, apical 

 half of the 4th paler than the basal half. Ocelli brown, placed about in & line 

 with the posterior margin of the eyes. Rostrum brown, reaching to the 3rd 

 pair of coxae ; 1st joint stout, a little more than twice as long as broad, clothed 

 with fine short hairs, 2nd about one-third longer than the 1st, 3rd longest, 

 thinner than the 2nd, 4th about equal to the 1st. 



Thorax — pronotum pitchy-black, very much deflected towards the head, finely 

 punctured, with a narrow brown collar in front, behind which are two unpunc- 

 tured shining callosities, separated by a slender faint channel ; posterior angles 

 slightly elevated ; posterior margin deeply concave across the scutellum ; ex- 

 tremities rounded. Scutellum pitchy-black, with a semicircular depression in 

 front ; apex white, slightly elevated. Elytra pitchy-black, shining, with a 

 steel-blue appearance in certain lights, sparingly clothed with short fine hairs : 

 clavus pitchy-black, shining, with a steel-blue appearance in certain lights : 

 corium considerably constricted from before to beyond the middle, its length 

 being occupied by a triangular white patch, its base about in a line with the 

 apex of the clavus ; apex white : membrane brown. Legs pitchy-brown ; 

 thighs pitchy-brown ; 1st pair sparingly clothed with short semi-erect hairs, 

 lower margin with stouter erect ones ; 2nd pair incrassated, with two rows of 

 short teeth on the apical half of the lower margin, base narrower than the 

 apex ; 3rd thinner and longer than the first : fulcrum : at the base with a long, 

 stout, curved tooth: tibia pitchy-brown, sparingly clothed with short hairs ; 

 1st pair dark brown, darkest at the apex ; 2nd pitchy-brown, curved, thicker at 

 the base than the apex; 3rd brown, base narrowly whitish-yellow: tarsi 



