Nov., 1906.] Guatemalan Orthoptera. ii 



ig.^Orphulella walkeri n. sp. Below medium in size, rather slender, the 

 antennae of male graceful and decidedly longer than the head 

 and pronotum combined. Color variable, ranging from testa- 

 ceous to green varied with brown and black. 



Eyes prominent, considerably ( J" ) or a trifle ( 9 ) longer than 

 the cheeks below them; fastigium of the vertex with the sides 

 parallel two-thirds its length, acuminate even in the female and 

 unusuallv deeply sulcate, lateral foveolae well defined, elongate 

 triangular; frontal costa prominent above the ocellus where they 

 are coarselv and paucily pvmctate; face rather oblique; antennae 

 long and slender. Pronotum slightly expanding posteriorly, 

 the two lobes about equal in length, the lateral carina in advance 

 of the last transverse sulcus straight and very gently diverging 

 anteriorly. Tegmina in the female provided with two rows of 

 cells, of moderate width and gently surpassing the apices of the 

 hind formora in both sexes, in tne female rather sparsely and even- 

 ly maculate with fuscous, in the male tmspotted but with the 

 dorsal held pale testaceous, the hind femora without markings or 

 bands save for the knees which are infuscated apically. Wings 

 infuscated or cloudy. 



Length of body, $ 13.5 mm., 9 19 mm.; of antennae, 

 (J 6.5 mm., 9 6 mm.; of pronotum, $ 2.5 mm., 9 3.95 mm.; 

 of tegmina, S 11.5 mm., 9 14.3 mm.; of hind femora, S 9.25 

 mm., 9 10.55 mm. 



Habitat. The types, $ and 9 > ^vere collected February 22, 

 at Los Amates, while an additional male was taken at Puerto 

 Barrios, on March 3. 



If we should attempt to run this insect out by the synoptic 

 table as given by the author in the "Biologia Central! Ameri- 

 cana, Orthopt. li, pp. 74-78," it would fall into the section A^ 

 under b'^ along with prominiila and robusta, but the table would 

 have to be modified as follows: 



b^. Lateral carinae of the pronotum not arcuate, either straight 

 throughout or parallel on the anterior lobe and more or 

 less divergent on the posterior one. 



c^ Antennae of the male more than ordinarily heavy; the 

 insects rather robust. 



d^. Lateral carinae of the pronotum gently and evenly 

 divergent posteriorly. Eyes prominent, elongate. 

 Face strongly oblique. prominula Bruner. 



d^. Lateral carinae of the pronotum divergent on the 

 posterior lobe only. Eyes less prominent, subglob- 

 ular. Face only moderately oblique. 



ROBUST.A. Bruner. 



c^. Antennae of the male filiform, slender. The insect 



rather graceful. walkeri n. sp. 



This might be one of Walker's species of Stenobothrus which 



he described in the Catalogue of the Dermaptera Saltatoria in 



the British Museum. It is almost impossible, however, to 



determine his species from the meager descriptions given. 



20. Heliastus guatemalae Sauss. Several specimens, males and females, 



are in the collection. They come from Amatitlan, February 3, 

 and Jan Jose, February 5.' They do not differ very greatly in 

 general color and form from H. sumichrasti Sauss., but the disk 

 of the wings of guatemalae is yellow instead of red. _ 



21. Arnilia minor n. sp. Verv similar in form to Arnilia chlorizans 



Walker, but differing from it in the much smaller size and in the 

 entire absence of the pale band along the sides of the head, pro- 

 notum and pleura. The last ventral segment of the male ab- 

 domen is also quite different. 



