176 OKTHOPTEEA. 



species has the lower posterior angles of the pronotum less acute than in T. mexicana, while the wings, 

 which have the greater part of the costal field and at least the apical one-third of the radial field 

 fuliginous, show no distinct transverse dusky band. The hind tibiae are brown, instead of glaucous as in 

 T. mexicana. 

 Length of body, S 16, $ 22-5; of pronotum, <$ 4-5, $ 5 ; of tegmina, S 16, 2 19 ; of hind femora, d 1 11, 

 2 12-4 millim. 



Hab. North America, Silver City, New Mexico {coll L. Bruner). 



Although the types of the present species come from a point 50 or 60 miles distant, 

 it most certainly occurs on Mexican territory as well. They were taken in July. 



3. Trachyrhachis inconspicua, sp. n. 



This insect can best be compared with T. compacta, although it also bears a rather close resemblance to 

 T. mexicana. It is less rugose and has a higher median carina on the pronotum than either of them, 

 and the lower posterior angles are as in the former. The general colour is brownish-testaceous, with the 

 usual fuscous markings. Its wings are hyaline, without trace of the fuliginous band, but the usual dusky 

 stigma is present in addition to some of the longitudinal veins ( $ ), or much of the apex is clouded ( S )• 

 Hind tibiae deep bluish-grey, their apices blackish. 



Length of body, <S 13*5, $ 22; of pronotum, tf 3-5, $ 4-25; of tegmina, S 13, $ 18*5; of hind femora, 

 S 10, $ 12 millim. 



Hab. Mexico, Zacatecas (L. Bruner : 2 6 , 1 $ ). 



It is barely possible that the insects referred by Eehn to T. mexicana, Sauss., are the 

 same as those here described as new. The types were found in November. 



4. Trachyrhachis townsendi, sp. n. 



In general appearance the present insect is very similar to T. Tciowa and T. thomasi, from both of which it is 

 readily separated by its broad and but little, if at all, anteriorly narrowed wing-band. In coloration 

 T. townsendi is very like some of the species of Trimerotropis — e. g., T. vinculata and allies ; but it differs 

 from them in its characteristic Trachyrhacine structure. The head is large, and a little wider than ( $ ), 

 or about as wide as ( $ ), the front edge of the rather strongly rugose pronotum. The latter has its median 

 carina moderately prominent on the anterior lobe, where both sections are evenly rounded, the front one 

 being about twice the length of the other ; on the hind lobe it is less elevated, but also slightly arched, 

 especially in the male, where the carina is much more pronounced than in the opposite sex. The tegmina 

 and wings are considerably longer than the abdomen, even in the female. Hind femora moderately robust, 

 nearly reaching (.$ ) or somewhat surpassing ( J ) the tip of the abdomen. 



General colour dull greyish-brown, profusely mottled and blotched with dark brown and dull black, the 

 . markings on the costal margin of the tegmina forming the usual two solid patches separated by pale ones 

 and on the dorsal field and apical half or two-fifths evenly conspersed with brown. Wings with the disc 

 pale greenish-yellow, crossed near their middle by a broad arcuate fuliginous band, which is produced 

 into a broad taenia that occupies most of the costal field towards the base, and posteriorly follows the 

 border halfway to the anal angle ; the apical portion is vitreous, in the male rather heavily, in the female 

 with a few dark blotches. Hind tibiae somewhat glaucous, more pronounced in the male, with a pale 

 basal annulus. 



Length of body, <$ 16, $ 27 ; of pronotum, J 3-5, $ 5-15 ; of tegmina, 3 17, 5 24 ; of hind femora, <5 10*5, 

 $ 14 millim. 



Hab. Mexico, Colonia Garcia, Chihuahua [C. H. T. Townsend). 



Only two specimens of this species are before me as I write. They belong to my 

 collection. 



