PHORTICUS.—NABIS. 301 
insect the anterior femora are strongly incrassate and have a sharp tooth at the middle 
beneath, and the anterior tibiz are greatly widened on the inner side towards the apex, 
with a short tooth before the tip; the intermediate femora are simple. 
1. Phorticus collaris. (Tab. XVIIL. fig. 21, ¢.) 
Phorticus collaris, Stal, Enum. Hemipt. ii. p. 109 (¢ ?)°. 
Hab. Norta America, Texas }.—Mexico, Teapa (H. H. Smith). 
One male, sent by Mr. H. H. Smith. One of Stal’s types from Texas has been seen. 
| NABIS. 
Nabis, Sect. I., Latreille, Gen. Crust. et Ins. iii. p. 127 (1807); Fieber, Europ. Hemipt. 
pp. 43, 159; Stal, Hemipt. Afr. ii. p. 41; Reuter, Ofv. Vet.-Ak. Forh. 1872, no. 6, p. 80; 
Rev. d’Ent. ix. p. 293. 
Coriscus (Schrank), Stal, Enum. Hemipt. iii. pp. 111, 112. 
Some authors, including Stal, adopt the name Coriscus, Schrank [Fauna Boica, i. 2, 
p. 46 (1801) ], for this well-known genus ; but as Schrank subsequently gives (op. cit. 
p. 99) C. dauct (=Alydus calcaratus, Linn.) as the type, it cannot be used. Various 
subgenera of Nabis have been proposed by Reuter and others, two only of these being 
represented within our limits. In this genus all the tarsi are 3-jointed, the anterior 
and intermediate tibiz have a lobe at the apex *, and the rostrum and antenne are 
4-jointed. Seven species are now known from within our limits, one of them being 
the holarctic N. ferus (Linn.)f. The undeveloped or brachypterous forms cannot 
always be satisfactorily determined in the absence of developed examples; and in at 
least two of the Central-American species the elytra vary in length in these forms. 
a. Anterior and intermediate femora beneath, and the tibize within, finely 
denticulate. [Hopxisroscezis, Reut.] 
a’. Legs with scattered long, fine, soft hairs. 
a". Posterior lobe of pronotum almost smooth. 
a", Body rather short, comparatively broad; legs moderately long ; 
abdomen not vittate above, infuscate beneath. 
a’, Anterior femora strongly incrassate: form robust . . . . . crassipes, Reut 
b*. Anterior femora moderately incrassate: form more slender . . nigriventris, Stal. 
5". Body moderately elongate, narrow; legs longer; abdomen vittate 
above; anterior femora moderately incrassate . . . . . . . sordidus, Reut. 
6". Posterior lobe of the pronotum rugose; elytra constricted below the 
base: form slender . 2. 2. 1 1 ee ew ew ee ee es) COnstrictus, u. sp. 
* Not noticed by Reuter. . 
+ The types of MW. crassipes, NV. sericans, N. sordidus, N. pallescens, N. rufusculus, N. punctipes, N. vicarius, 
‘and IV. roseipennis, Reut., have been lent me by Dr. Aurivillius for examination. 
