AMERICAN MUTlLLIDiE. 281 



1. Bracliycii^tiM ampins Blake. 



Aijama ampla Blake, Tr. Am. Ent. Soc, vii, 2o^, %, 1879. 

 Photopsis ampins Blake, il)id, xiii, 266, % , 1886. 

 Brachj/cistis ampins Fox, Ent. News, v, 21*6, 1894. 

 Mntilla ampla Dalla Torre, Cat. Hym., viii, 8, 1897. 



Ci)lora(l(): Custer (Cockerell). 



2. Bracliyristis idioteH Ckll. 



Brachjicistis idiotes Cockerell. Ent. News, vi, 63, % , 1895. 

 Mutilla idiotes Dalla Torre, Cat. Hym., viii, 49, 1898. 



New Mexico : Las Cruces, November 21st (Cockerell). 



3. Bracliycistis nitidus Cress. 



Arinma nitida Cressoii, Wheeler's Survey W. 100th Mer., v. 710, %, 1875. 



Photopsis nifidas Blake, Tr. Am. Ent. Soc, xiii, 267, % . 1886. 



Photopsis sohriuus Blake, ihid, xiii, 268, % , 1886. 



Photopsis lepidus Blake, ibid, xiii, 269, "J, , 1886. 



Brachycistis nitidiis Fox. Ent. News, v, 296, 1894. 



Brachycistis lepidus Fox, ibid. 



Brachycistis sobrinus Fox, ibid. 



Mutilla lepida Dalla Torre, Cat. Hym., viii, 52, 1897. 



Mntilla nitida Dalla Torre, ibid, viii, 66, 1897. 



Mntilla sobrina Dalla Torre, ibid, viii, 86, 1897, 



Colorado ; New Mexico. I am unable to detect specific differ- 

 ences in nitidus, sohrinus and lepidus. The convexity of first seg- 

 ment seems to vary, the segment being tolerably flat in nitida, and 

 decidedly convex in lepidus, the intermediate form existing in 

 sobrinus. 



4. Brachycistis iiucliis n. sp. 



%. — Dark castaneous, legs darker; head black; antennje brownish; tarsi 

 testaceous; entire insect almost nude, except for a few hairs on the thorax 

 beneath ; head distinctly narrowed behind ; space between hind ocelli greater 

 than that between them and eyes; dorsulum indistinctly punctured; middle 

 segment smooth above, posterior surface with large, sparse punctures apically: 

 first abdominal segment strongly punctured basally. elongate, the basal portion 

 quite slender, with tlie apical portion swollen, so as to make it clavate ; remaining 

 segments distinctly punctured, but not closely ; wings subhyaline ; nervures tes- 

 taceous ; stigma dark brown; second submarginal cell triangular, the first and 

 second transver.so-cubital veins uniting above; marginal cell about half as long 

 as tlie stigma. Length 10 mm. 



California. One specimen. 



The third submarginal cell is partially obliterated in the speci- 

 men before me, which possesses but one superior wing, but from 

 appearances it is quadrate in perfect specimens, and is quite as long 

 as the second submarginal on the cubital nervure. 



TRANS. AM. ENT. SOC. XXV. ^36) MARCH. 1899. 



