1905.] 



NATURAL SCIENCES OF PHILADELPHIA. 



403 



caudal angle subrotundate and not produced. Tegmina exceeding 

 the tips of the abdomen and the caudal femora by the length (cephalo- 

 caudal) of the head, subequal in width, the costal dilation apparent 

 but not very large; apex obliquely truncato-rotundate; intercalary 

 vein indistinct, irregular and of an indefinite character. Wings equal 

 to the tegmina in length when closed; costal margin a very faint 

 reverse curve in outline; apex rather bluntly rounded. Interspace 

 between the mesosternal lobes twice as broad as long ; interval between 

 the metasternal lobes about three times as broad as long. Caudal 

 femora robust, the genicular region not strongly enlarged, tibice slightly 

 but distinctly shorter than the femora. 



Fig. 1. 

 Heliastus costaricensis n. sp. 



Fig. 3. 



T}T)e. Fig. 1, dorsal view; fig. 2, cephalic view of 

 head; fig. 3, lateral view. 



General color, above raw umber, becoming fawn color on the sides of 

 the head and pronotum. Head distinctly punctate with blackish- 

 brown; antennae fawn annulate with blackish-brown, the annuli of 

 each color increasing in size distad ; eyes dark ferruginous. Pronotum 

 with the metazona finely and closely punctulate with blackish-brown. 

 Tegmina with two irregular transverse bands made up of burnt-umber 

 annuli, one band median, the other premedian; the principal longi- 

 tudinal veins are accompanied by rows of annuli of the same color and 

 size, but more sparsely distributed and absent from the apical fom-th, 

 which is almost entirely hyaline; the median section of the tegmen 



