220 AN ASIATIC SPECIES OF ATLANTICUS (oRTHOPTERA) 



Atlanticus palpalis new species 



The species has a unique position in the genus, being distin- 

 guishable from all the previously known forms by the much more 

 elongate distal palpal joints, the evident tegmina in the female 

 sex, which pi-oject appreciably caudad of the pronotum, and 

 the very regular paginal pattern of the ventral portion of the 

 external face of the caudal femora. Otherwise the new form 

 has most resemblance to americanus, iestaceus, pacMjmerus, monti- 

 cola and davisi, more particularly to pachymerus. The affinity 

 with americanus is evidenced in the general form and proportions, 

 particularly of the fastigium, pronotum and limbs, but the form 

 of the ovipositor and of the subgenital plate are additional fea- 

 tures of difference. The relationship with testaceus is largely 

 apparent in the ovipositor form, and in a general way that of the 

 subgenital plate, but additional differences are evident in the 

 much more elongate limbs and deeper head, as well as the nar- 

 rower fastigium. With davisi, pachymenis and monticola we find 

 the closest general affinity, the form of the ovipositor, of the 

 subgenital plate and of the whole insect, except the proportions 

 of the limbs, being much more nearly as in those species. The 

 size is, however, far larger than in any of these and the general 

 characters of difference given above are quite sufficient to enable 

 one readily to recognize the species. 



Type. — 9 ; Yen-ping, Province of Fukien, China. July 12, 

 1917. [American Museum of Natural History.] 



Size large: form elongate fusiform, as usual in the genus, micropterous: 

 surface smooth, moderately polished on face, genae and lateral lobes of pro- 

 notum, less so on limbs and ovipositor. 



Head well seated in the pronotum, in profile the fastigio-facial angle is 

 rounded rectangulatc: fastigium of vertex of medium width, very finely 

 sulcate dorsad, ventrad with margins concavely converging to truncate apex, 

 which is in contact with the fastigium of the face: facial line weakly retreat- 

 ing, face slightly deplanate; width of head across ventral portion of genae 

 greater than width across eyes. Palpi slender, elongate: maxillary palpi with 

 third joint nearly as long as the two proximal joints of cephalic tarsi; fourth 

 joint of same three-fourths as long as third joint, weakly infundibuliform, 

 sharply narrowed joroxiniad; distal joint of same twice as long as third joint, 

 straight ex<-ept very briefly distad, faintly enlarging distad in proximal two- 

 thirds, distal extremity thickened and subelavate, with a weak flexor bend, 

 the distal margin with a weak oblicjue truncation; labial palpi with distal 

 joint enlarged similarly to but less decidedly than the distal maxillary palpal 



