Nov., 1906.] 
Guatemalan Orthoptera. 
1 1 
19. ^_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 ( S ) 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 
unusually deeply sulcate, lateral foveolae well defined,,elongate 
triangular; frontal costa prominent above the ocellus where they 
are coarsely and paucily punctate; 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 unspotted but with the 
dorsal field 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, 
$ 6.5 mm., 9 6 mm.; of pronotum, $ 2.5 mm., 9 3.95 mm.; 
of tegmina, $ 11.5 mm., 9 14.3 mm.; of hind femora, $ 9.25 
mm., 9 10.55 mm. 
Habitat. The types, $ and 9 . were 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 Centrali Ameri¬ 
cana, Orthopt. 11, pp. 74-78,” it would fall into the section A 2 
under b 2 along with prominula and robusta, but the table would 
have to be modified as follows; 
b 2 . 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 1 . Antennae of the male more than ordinarily heavy; the 
insects rather robust. 
d l . Lateral carinae of the pronotum gently and evenly 
divergent posteriorly. Eyes prominent, elongate. 
Face strongly oblique. prominula Bruner. 
d 2 . Lateral carinae of the pronotum divergent on the 
posterior lobe only. Eyes less prominent, subglob- 
ular. Face only moderately oblique. 
robusta Bruner. 
c 2 . 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. Very 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. 
