DESCRIPTIONS OF NEW HYMENOPTERA, NO. 8. 



By J. C. Crawford, 



Associate Curator, Division of Insects, United States National Museum. 



This paper contains the results of an examination of a small but 

 extremely interesting collection from Trinidad, sent by Mr. F. W. 

 Urich. Coming from a region from which so little is known, most of 

 the species proved to be undescribed. Attention is also called to the 

 habits recorded in this paper of the female of Trissolcus euschisti 

 brooding over her eggs, until they are almost ready to hatch. 



Where both sexes of a species are described, the one described last 

 is the allotype. Comparative measurements where given in figures 

 were made with the Zeiss binocular microscope equipped with number 

 2 eyepieces and the a^ objective and an eyepiece micrometer. 



Superfamily SERPHIDOIDEA. 

 Family SCELIONIDiE. 



TRISSOLCUS EUSCHISTI Ashmead. 



On August 4, 1912, Mr. H. L. Viereck collected on Plummers 

 Island, Maryland, some hemipterous eggs (later determined by Mr. 

 Heidemann as probably the genus PeriUus) over which a female of 

 the above species was brooding. For several days while kept in a 

 vial she continued to show great solicitude over the eggs which at the 

 time they were collected were beginning to turn dark as a result of 

 the development of the pupae. She continued this brooding until sepa- 

 rated from the eggs to keep her distinct from the progeny, the first 

 of which appeared on August 13. In all 22 issued (all females) and 

 some three or four died without being able to emerge. 



TRISSOLCUS URICHI, new species. 



Female. — ^Length about 1,25 mm. Black, the legs, except coxae, 

 and antennae, except the brown club, ruf o-testaceous ; face reticulated 

 and with scattered punctures; no smooth medial area in front of 



Proceedings U- S. National Museum, Vol. 46-No. 2029. 



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