230 PROCEEDINGS OF THE ACADEMY OF 



LARGID^E. 

 Largus, Hahn. 

 L. c i n c t u s , H. Schf. W. I. vii. tab. 218, f. 683. California. 



ECTRYCHODID.E. 



Physorhynchus, Serv. 

 P. crux, Thunb. Dissert. Acad. 156. Hahn. W.I. i. tab. 5, f. 20. Cape 

 Good Hope. 



HARPACTORID^E. 

 Arilus, Burm. 



A. bifidus, Fab. Ent, Syst. 4, 204. Donovan, Ins. China, pi. 21, f. 5. 

 Hong Kong. 



Harpactor, Lap. 



H. nodi pes. Black, polished ; head black, pubescent, bilobed, grooved 

 between the ocelli ; ocelli whitish ; eyes large, black ; antennae black, apical 

 joints piceous, pubescent, basal joint with two whitish rings upon the middle ; 

 rostrum robust, black ; thorax pubescent, longitudinal impressed line, inter- 

 rupted upon the middle of the posterior lobe, prothorax each side of the head 

 produced into a subacute tubercle ; scutellum without spinous processes ; 

 corium pitchy-black, membrane fuliginous, nervures darker; tergum blackish, 

 lateral margins much dilated, crenulated, the incisures and a large postero- 

 lateral spot upon the two last segments, whitish ; beneath, black polished, 

 venter sprinkled with numerous round, yellow points, the two posterior seg- 

 ments tinged with pale piceous ; the spots of the upper marginal surface obvious 

 beneath ; legs black, three knot-like pilose prominences upon, and near the 

 tips of the femora, two yellow bands upon the femora, and one upon the 

 tibiae ; nodulae much less obvious in the $ than in the 9 ! yellow femoral 

 bands, also more numerous in the male. 



Length 12 millim. Simoda, Japan. 



STENOPODID.E. 



Canthesancus. 



C. trimaculatus, Aniyot et Serv. Hemipt. 389, pi. 7, fig. 20. Hong 

 Kong. 



GERRID^E. 



Halobates, Esch. 



H. sericeus, Esch. Entomograp., 164, 79, tab. 2, f. 4. Atlantic Ocean 

 near the Equator. 



Ptilomera, Amyot et Serv. 



P. tigrina. $ Fulvous, polished, beneath silvery sericeous; rostrum 

 with the apical joint and tip of the preceding one black, nasus and spot at 

 the origin of the antenna black, head impressed at the origin of the rostrum, 

 eyes brownish-black; prothorax subquadrate, largely impressed posteriorly, 

 sides of the thorax with a silvery undulating line bounded each side by a 

 black line, and extending from the base of the prothorax to the origin of the 

 posterior legs, sutures black, behind the head three minute spots, behind the 

 prothorax, included in a rounded impression, two larger ones and upon the 

 posterior transverse suture, silvery sericeous ; metathorax impressed each side 

 against the anterior transverse suture, and having a slender impressed middle 

 line ; abdomen much narrower than the thorax, about equal to it in length, 

 sutures black, particularly at the sides of the segments, sides of the segments 

 slightly sericeous, anal and caudal appendages filiform, acute ; two lamellar 



["June, 



