AMERICAN HYMENOPTERA. 263 



^4. haxihiris; antennae short and stout as in Selandria ; head polished; 

 basal joint of antennsie and second joint beneath, two oval spots above 

 their base, nasus and mouth beneath, lower half of cheeks, teuulne, an- 

 terior angle, a large triangular spot on pleura, a round spot above pos- 

 terior coxae, scutel and post-scutel. basal plates, an interrupted fascia 

 on first and second segments of tergum, an irregular band on fourth 

 and fifth, the whole of fourth, sixth and seventh segments and apex of 

 tergum, and the fourth segment of venter straw-yellow, those on the 

 tergum having a rufous tinge; legs yellowish ; the basal half of coxae, 

 the upper apical half of posterior femora, the tips of all the tibias and 

 tarsi black ; patellae black. Wings slightly clouded, nervures black, 

 base of stigma and costa ferruginous. 



% . The male has the basal half of the first and second segments, 

 most of the third, and all the fourth segments of tergum and all but 

 the two apical segments of venter pale yellow, remainder black. 



Cape Mendocino, Cal., (Cambr. Mus.) Collected by A. Agassiz, Jr. 



This is much like A. basilar is, but is smaller, the abdomen shorter 

 and less compressed, &c. 



5. Allantus interruptus, n. sp. 



Black ; two dots above antennse, the mouth below, cheeks, tegulse, collar, a 

 sjiot above hinder coxse, scutel, basal plates, and an interrupted band on all 

 but the three apical segments of tergum yellowish. Length 0.40. Br. wings 

 0.80 inch. 



9 . Quite short and compressed, shining black ; antennae moderate, 

 of one color; head polished; two oval dots above antennae, nasus and 

 mouth below, cheeks, tegular, collar, a spot above hinder coxie, scutel, 

 basal plates, a slender line on each side above, a fascia, interrupted in 

 middle, on the first, second, third, fourth and fifth segments of tergum, 

 the sixth, seventh and apex above and beneath straw-yellow; legs yel- 

 lowish ; the coxae, a line down the upper side of all the femora and the 

 upper and lower tips of tibiaj black; wings hyaline, slightly clouded, 

 nervures black, base of stigma pale. 



Cape Mendocino, Cal., (Cambr. Museum. Coll. by A. Agassiz, Jr.) 

 One 9 . 



The abdomen is quite short and stout. 



6. Allantus maximus, n. sp. 



Black ; the mouth, collar, scutel, spot above the four hinder coxre, and a band 

 on the fourth and fifth segments of abdomen yellowish. Length 0.54. Br. wings 

 1.08 inch. 



$ . Thorax and abdomen very wide. Antennae short, stout, tinged 



with ferruginous near the middle; head very large, as wide as thorax, 



