164 ENTOMOLOGICAL NEWS [April, 'lO 



lished, together with the two specimens here referred to, has 

 enabled me to draw up the annexed synoptical table for the 

 separation of the known species : 



Synopsis of the species of Trybliophorus. 

 A Sides of the face, pronotum and pleura varied by pallid or yellow lines 



or maculations. 



b Size smaller (9 25-28 mm.). The face, cheeks and sides of prono- 

 tum and pleura in advance of the insertion of the hind femora 

 adorned by a row of four whitish maculations [Cayenne, French 



Guiana) i. OCtomaculatus Serv. 



bb Size larger (9 32-39 mm. or more). The face, cheeks, sides of 

 pronotum and pleura adorned with yellow bands or macula- 

 tions. 

 c Size medium (9 32-34 mm). 



d Hind femora pale coral red, the tibiae dark blood-red with 

 brownish apices and black spines (Fontehoa, Amazonas]. 



2. corallipes Gerst. 



dd Hind femora testaceous, the tibiae barely tinged with red, 

 the spines black tipped [Surinam or Dutch Guiana]. 



3. elegaus Rehn. 

 cc Size large ( 9 39 mm. or more). 



d Antennae reddish brown. Wings only faintly infuscated [North 



Central Peru] 4. peruviana Bruner. 



dd Antennae purplish red. Wings blackish [Brazil]. 



5. bivittatus Walk 



AA Sides of the face, pronotum and pleura unadorned by pallid or yel- 

 low lines or maculations [Ega, Amazonas] . 6. voluci'is Gerst. 



The species octomaculatus Serville is, of course, the type of 

 the genus, while corallipes Gerstaecker and elegans Rehn are 

 both quite nearly related to it. In fact, it is rather difficult to 

 decide just which one of these two should immediately follow 

 the type when the species are arranged in sequence. The spe- 

 cies peruviana Bruner and bivittatus Walker are both larger 

 than the other four, but are also quite similar in general color 

 and markings to the type and Gerstaecker's and Rehn's species 

 just referred to. The species volucris Gerstaecker is unique in 

 lacking the pallid maculations on the face, sides of the head, 

 pronotum and pleura. Whether it should precede octomaculata 

 in the arrangement of the species or remain at the end of the 

 list has not been definitely decided. 



