48 SUPPLEMENT. 



Genus ACANTHODIPHRUS. 



Fcem. Corpus sat gracile. Caput prothoraci aequilatum ; frons per- 

 parum obliqua. Oculi rotundi, prominuli. Palpi maxillares sat longi ; 

 articulus 4us subclavatus, 2o multo longior. Antenna) graciles, corpore 

 longiores. Prothorax tuberculatus, sellatus, margine antico subdentato 

 oblique uuispinoso, margine postico retuso quadrispinoso. Abdomen sub- 

 compressum. Cerci lanceolati, robusli, breves. Vagina perparum arcuata, 

 abdomini aequilonga. Pedes longi, femoribus quatuor posterioribus unise- 

 riatitn spinosis, tibiis quatuor posterioribus genubusque spinosis. Ala3 

 brevissimae. 



Female. Body rather slender. Head as broad as the prothorax; 

 sockets of the antennae forming ridges on the inner side; front very 

 slightly oblique. Eyes round, prominent. Palpi moderately long. Second 

 joint of the maxillary palpi much longer than the first and than the third; 

 fourth subclavate, much longer than the second. Third joint of the labial 

 palpi clavate. Antennas slender, longer than the body. Prothorax tuber- 

 culate, saddle-shaped, with two transverse impressed lines ; fore border 

 arched, slightly dentate, with an obliquely ascending spine; hind border 

 retuse, with two spines on each side. Abdomen slightly compressed. Cerci 

 lanceolate, stout, short. Oviduct with an ensiform and very slightly curved 

 sheath, full as long as the abdomen. Legs long; four posterior femora 

 armed with one row of stout spines ; knees and four posterior tibiae armed 

 with spines. Wings rudimentary. 



Nearly allied to Polyancistrus. 



ACANTHODIPHRUS CONSPERSUS. 



Foem. Fuscus, testaceo eonfertim maculalus el punctatus; antenna 

 testaceo annulate. 



Female. Brown, thickly and irregularly speckled with pale testaceous 

 spots, dots and points. Antennas with many pale testaceous rings. Oviduct, 

 legs and fore wings speckled like the body. Length of the body 16 lines. 



a. Chontales, Nicaragua. From Mr. Janson's collection. 



Page 457. 

 Cymatomeba pabadoxa. 

 paradoxa, Gerst. Arch. Naturg. xxxv. 214. 

 Zanzibar. 



Mecopoda elongata. 

 Decticus tenebrosus, p. 263. 



Page 459. 

 Mecopoda frontalis. 

 Foem. Nigricans ; caput lave, fasliyio maculaque frontali luteis ; 

 antenna rufescentes ; prothorax punctatus; vagina subarcuatus, 

 abdomini aquilonga ; tibia antica fulva ; ala antica obscure 

 fusca. 



