RHYNCHITlD.i: — ISOTIIHIN.K — T()X()JIHYN('111M. 23 



this is rather sleiuh-r, apparently t'(|iial nr a Httlc stouter at l)ase than in 

 the middle, of the length of the prothorax, and with the slightest i)os.sil)le 

 arcuatiou. Prothorax densely l)iit imt very coarsely punetate (granulate 

 by reverse), with the slightest possible indieation of" a somewhat irregidar 

 transverse disposition. Klvtra rather coarseh punctate-striate, the inter- 

 spaces also punctate, hut more finely and less conspicuously. 



On account of its small size, the punctate head free from transverse 

 corrugations, and the obscurity attacliing to the rostrum by its inflexed 

 position and not perfectly clear preservation, 1 have Iiad some douljt about 

 placing this insect here, but the position of the rostrum seems to l)e due 

 to the excessive bendhig of the head, as shown h\- the longitudinal wrinkles 

 behind the summit, Avhich appear to belong to tlie softer membrane natur- 

 ally concealed, and if this be conceded, there seems to be no valid reason 

 for refusing it a place here. 



Length over the body from tip of rostnun to tip of ehtra (restor- 

 ing the head to an assumed natural position), 5"2"""; length of rostrum, 

 I"""; height of body, IS'"'". 



Florissant, Colorado. One specimen. No. S.")!."). 



Tribe TOXORHYNCHINI. 



The members of this triln- havi^ commonh' a plump, arched body, 

 rarely elongate, and are usually of small size, though the largest are nearly 

 as large as the smallest of the Isotheini, excepting Tri/pariorhi/ncJius sedatu.t; 

 the head is u.sually shorter, the rostrum straight or gently curved, usually 

 of considerable length, and always porrect. 



Tabic of the (jcnern of Toxorhyiuhlni. 



Rostrnni straight, rod-like Docirhyiivhus. 



Uostrum geutly curved. 



Ueiid excluding rostrum aluio.st as long as the prothorax. 



Body elongate, relatively slender, iiuk li ihkic tliaii twice as long as high 



Tent rum. 



Body compact, rounded, stout, scarcely twice as long as high..roj-o/7i.i/'"'/iM#. 



Head excluding rostrum very much shorter than prothorax t-'teganug. 



