ARNILIA. 257 



and at the edge of a small stream, where it was taken from aquatic vegetation, to which 

 it clung tenaciously. When disturbed it jumped and flew readily, but very frequently 

 tried to hide by dodging to the opposite side of the blade of grass or stem, to which it 

 clung. 



4. Arnilia minor, Bruner. 



Arnilia minor, Bruner, Ohio Naturalist, vii. pp. 11, 12 (1908) \ 



As the original description of this species was based solely on the male, it is thought 

 best to give herewith a modified description including both sexes : — 



Smaller and a little more slender than A. marschalli, the subanal plate of the male abdomen shorter and 

 differently constructed, the wings paler, and with less distinct pale lateral bands. 



Fastigium of the vertex a little longer than broad at the base, the middle provided with a shallow longitudinal 

 sulcus. Eyes somewhat prominent, the portion of the cheeks below them a little shorter than their 

 shortest diameter, separated above by a space equal to the diameter of the second an tennal joint ( 3) or 

 the width of the frontal costa between the antennae ( $ ). Face a little more oblique than in A. vitrei- 

 pennis. Antennae slender, about as long as the head and pronotum combined. Pronotum closely 

 punctate, not quite as smooth at sides as in A. marschalli ; the transverse sulci moderately impressed, 

 the posterior one slightly sinuous at middle ; median carina visible throughout in the female, nearly 

 obliterated on the anterior lobe in the male. 



Tegmina proportionately longer than in the preceding species, a little more acuminate, and more closely veined 

 on the basal third. Hind femora slender and reaching the tip of the abdomen in both sexes. Prosternal 

 spine robust, the apex bluntly rounded. Last ventral segment of male abdomen short, about as long as 

 its basal width, the lateral teeth short and gently divergent. Hind margin of the last dorsal segment 

 provided with three black spots, the lateral margins of the supra-anal plate pale, but the carina at sides 

 of median sulcus narrowly adorned with black. Hind tibiae very slender. 



General colour pale grass-green, scarcely marked with the pale lateral lines or dorsal ferruginous tinge so 

 prominent in most specimens of the preceding species. Wings clouded with bluish-grey and fuscous, but 

 to a less degree than in A. marschalli. 



Length of body, <S 21, $ 25; of pronotum, S 3'55, $ 4*1; of antennae, c? $ , 7 ; of tegmina, c? 20, $ 23; 

 of hind femora, J 11*5, 2 14 millim. 



Hab. Mexico, Medellin, Vera Cruz (Eev. Heyde) ; Guatemala *, San Jose (J. S. Hine). 



Two females, one of which was captured in February. 1 have also before me a male 

 of similar size and form that has been preserved in alcohol, and which bears the label 

 " Central America, Heyde." It shows a decided trace of the pale line on the sides 

 of the head and body, and also has some dark colour on the lateral margins of the 

 supra-anal plate. 



5. Arnilia propinqua, sp. n. 



This locust is very similar in general form and appearance to the female of A. minor, but it is much larger,, 

 being about the size of A. Jissicauda and A. cylindrodes. It is somewhat more slender and has slightly 

 longer tegmina and wings, however, than they have. The fastigium of the vertex is blunt and without the 

 faint longitudinal median sulcus mentioned in connection with the description of one or two of the other 

 species. Its dorsum is more or less ferruginous on the occiput, the disk of the pronotum, and the folded 

 tegmina. The face, sides of head, sides of pronotum, pleura, costal area of tegmina, and legs are pale 



biol. CENTK.-AMER., Orthopt., Vol. II., May 1908. 2 Ll 



