1871.] 93 [Uhler. 



Weak -fish, Otolithus regalis Cuv., the Spanish mackerel, 

 Scomber Decay i Storer, and the Halibut, Hippoglossus vulga- 

 ris Cuv., as gradually occupying the waters of a higher latitude. 



February 1, 1871. 



The President in the chair. Forty persons present. 



The following papers were presented : — 



Notices of some Heteroptera in the Collection of Dr. 

 T. W. Harris. By P. R. Uhler. 



Fam. PACHYCORIDA. 



Aulacostethus. Nov. Gen. 

 Head about two-thirds as .long as the width across the eyes, much 

 shorter than the pronotum ; bluntly curving to the tylus. Tylus 

 longer than the lateral lobes, cylindrically elevated above the plane 

 of the adjoining surface. Ocelli near the base and not far from the 

 eyes. Inferior lobes blunt, convexly thick, the bucculas very slender; 

 rostrum extending almost to the end of the second ventral segment ; 

 the second joint subequal to the third and fourth united ; the third 

 and fourth equal. Pronotum almost twice as broad as long, subhexag- 

 onal, the lateral and posterior angles bluntly rounded ; the anterior 

 aspect steeply convex, the humeri elevated into a rounded knob, 

 bounded inwardly by a distinct depression ; the lateral edge narrow, 

 raised, the submargin longitudinally impressed. Sternal raised Haps 

 short, broadly rounded, not quite reaching to the base of the antennse. 

 Lateral margin of the sternal groove feebly elevated between, the 

 anterior and intermediate coxa3, but thick and much elevated between 

 the intermediate and posterior coxse. Femora stout ; exterior face 

 of tibia? obsoletely carinate, the exterior edges acutely carinate. 

 Odoriferous duct long, rather straight, running from the coxa almost 

 to the exterior margin of the plate on which it lies, the osteole placed 

 at the inner end of the groove, the groove deep and occupying more 

 than one halt* the length of the duct. Scutellum a little humped at 

 base, a little inclining from the base to the middle and then obliquely 

 declining to the tip ; the sides broadly rounding towards the tip; 

 edge of connexivum acute. 



