MONOGRAPH OF THE NORTH AMKRICAN PROCTOTRYPID.E. Ill 



icel to club; joint 1 of fuuicle somewhat longer than pedicel, Joint 3 

 shorter, joints 4 to 8 increasing in length very slightly. Head and 

 mesouotnm very faintly shagreened, but still glistening; lower portion 

 of niesopleura and all of abdomen perfectly smooth. Abdomen sub- 

 ovoid in shape, acutely pointed at tip. Radial vein only slightly curved, 

 extending a little more than half way from stignni to tip of wing. 

 General color jet black; all trochanters, femora, and wing veins dark- 

 brown; all tibiic and tarsi lighter brown." (Hoirard.) 



The $ is slightly smaller, with the flagellar joints 1 to 7 dentate, the 

 first being 2J times as long as thick, excluding the i>edicel, while the 

 mesopleura are scaly- jiunctate. 



Habitat. — United States. 



Tj^es in National Museum. 



Parasitic on the wheat aphis, Siphonophora avenw Fabr. 



Allied to L. stigmatus Say, but relatively larger, and at once distin- 

 guished by the difference in the length of the flagellar joints. 



Lygocerus 6-dentatus, sp. nov. 

 (PI. VI, Fig. 8, <?.) 



9 . Length, 1.2™"*. Black, coriaceous, faintly serice<ms ; mesopleura, 

 coxte, and abdomen highly polished, shining, impunctured ; legs brown- 

 ish yellow, the coxie polished black; wings hyaline, the stigma semi- 

 circular, brown, the stigmal vein 1^ times as long as the stigma; 

 antennse brown-black, the jicdicel and first flagellar joint equal, the 

 last joint longer than the pedicel. 



5 . Length, 1.1""". Agrees well with the 9 , except that all the fe- 

 mora and the posterior tibiie are darker, the antennte black, the flagel- 

 lar joints 1 to serrate, with long hairs, the first being scarcely twice 

 as long as thick. 



Habitat. — District of Columbia. 



Types, 3 and 9 , in ]!^ational Museum. 



This species is labeled as having been bred July 22, 1886, from Sarro- 

 thripa raicaymia, on willow ; but e\'idently the record is unreliable, and 

 in all probability it came from some Aphidid or Cecidomyiid overlooked 

 by the recorder. 



Lygocerus califormcus, sp. nov. 



S . Length, 1.1™"". Black, shining, alutaceous; .abdomen piceous 

 or obscure, rufous basally; legs brown, the anterior tibiae and tarsi 

 honey- yellow, the coxae black. Antennae black, flagellar joints 1 to 6 

 serrate, pubescent. Wings hyaline, the stigma semicircular, the stigmal 

 nervure nearly straight, not, or scarcely, longer than the stigma. 



Habitat. — Los Angeles, Cal. -..^^ -...■,,-...- ^^^-W'~ 



Type in i^ational Museum. 



Described from a single $ specimen reared by Mr. A. Koebele, from 

 a Cecidomyiid gall on Larrea mexicana. 



