MONOGRAPH OF THE NORTH AMERICAN PROCTOTRYPID.E. 63 



Meaitiug, while its supijosed S , OmaluK/uMcieornitt Jnrine, is a genuine 

 Isobrachium. An error of this kin<l does not necessarily invalidate 

 the genus, the umle still holding good as the tyi)e of the genuH. A 

 male specimen of Otnalux fmcicornxH is in my collection, and although 

 it closely resembles males of Epi/ris and MenUius it is «]uite distinct, as 

 I have pointed out, and it is here made the type of the genus Inobra- 

 chiiim Forster. 



The following table will be found useful in separating the North 

 American species: 



TABLE OF SPECIES. 



CoxiB and legs pale rufous or houey-yellow 2 



Coxa^ ami fenioru black ; wings subhyalino or fnscous. 



AntenniB and legs black, the tarai fuscous <J M. monticola Ashm. 



Antenna* and legs dark rufous 9 M. vancoc verensis, sp. uov. 



Front coxiu and femora black, middle and posterior femora rufous, or only 

 slightly dusky. 

 Trochanters, tibiie, ;uid tarsi rufoua. 



Wings subfuscous 9 M. nevadensis, sp. nov. 



Wings hyaline. 

 Anterior tibite and tarsi and middle and posterior legs fuscous ; antenna) 



dark fuscous <J M. minltus, sp. nov. 



Anterior tibise and tarsi and middle and posterior legs, brownish-yellow ; 

 their femora more or less dusky ; antenna* rufous 9 . 



M, CALIFOKNICUS, sp. UOV. 



2. Wings subhyaline. 



Legs brownish-yellow or pale rufous. 

 Tip of abdomen not rufous; metathorax with about 7 raised lines, the lateral 

 abbreviated; <? antenna; fuscous ; 9 antenna; yellow. 



M. BIFOVEOLATUS, sp. HOV. 



Tip of abdomen rufous ; metathorax with about 12 raised lines 9 • 



M. TEXANi's, sp. nov. 

 Wings not fully developed, reaching only slightly beyond base of abdomen. 



Legs rafou8 M. bbachyptekus, sp. nov. 



Mesitius monticola Ashm. 

 Epyrig monticola Ashm. Bull. No. 1, Col. Biol. Assoc, p. 8. 1890, ^ . 



i . Length 4""". Black, smooth, shining. Head sparsely punctate, 

 each ocellus surrounded in front by a depression. Antennie black, 

 covered with a fuscous pubescence, 13-jointed, reaching to the middle 

 of the metathorax, the first joint the thickest, the length of the fourth, 

 the second joint the shortest, the third slightly longer, the fourth and 

 following joints slightly longer than the third and about of an equal 

 length or very nearly so ; terminally the antenna? are a little thinner than 

 at base. Thorax above with some rather long, fuscous hairs, trapezoidal, 

 the mesonotum with two grooves, slightly converging toward each other 

 posteriorly but still widely separated. Scutellum flattened, with two 

 small, widely- separated fovese at base, each fovea being exactly opposite 



