1905.] 



NATURAL SCIENCES OF PHILADELPHIA. 



799 



silicate mesonotum, w, akly ridged tegmina, long metatarsi and elon- 

 gate antennal joints show. 



Size medium; form very slender; surface not polished. Head longi- 

 tudinal, subequal; occiput with three impressed longitudinal lines 

 caudad ; ocelli present, the cephalic 

 large, elliptical, placed between the in- 

 sertions of the antennae, caudal pair 

 smaller, placed diagonally at about the 

 cephalic third of the occiput; eyes 

 slightly elliptical, projecting, slightly 

 flattened ; antennae composed of about 

 twenty-five joints, some very poorly 

 defined, and, except the proximal two 

 and the terminal joints, the segments 

 are very slender and elongate, the 

 whole antennae laid back exceeding the 

 tip of the abdomen, second joint some- 

 what inflated . Pronotum nearly twice 

 as long as broad, narrow, transverse 

 line slightly in advance of the middle. 

 Mesonotum over twice the length of the 

 pronotum, subequal in width, fine longi- 

 tudinal median sulcus present, dorso- 

 lateral angles with distinct carinse, 

 accompanied dorsad by longitudinal 

 sulci which are rounded contiguous 

 caudad; mesosternum without longi- 

 tudinal median carina. Metathorax 

 very slightly longer than the meso- 

 thorax. Tegmina about equal to the 

 mesonotum in length, apex rounded; 

 tubercle longitudinal, low and weak. 

 Wings in repose reaching to the caudal 

 margin of the fifth abdominal segment. 

 Abdomen with the six proximal seg- 

 ments longitudinal, the first to fourth 

 subequal in length, the fifth and sixth 

 decreasing, seventh al)out two-thirds 

 the length of the sixth, eighth about two-thirds the length of the seventh, 

 ninth subequal to the eighth in length, the caudal margin truncate; 

 cerci compressed, tapering, acute, slightly longer than the ninth dorsal 



Fig. 4. Olcypnides viridipes n. 

 sp. Dorsal view of type. (X 2.) 



