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in the midrib of the leaf, and pupates at the end of this. Whether 

 the Chalcid would spare or pass by eggs parasitized by the My 

 marids is uncertain, but it certainly readilv destroys luiparasitized 

 eggs of the leaf-hopper. 



TRICHOGRAMMIDAE. 



Trichogrannna hclocliarac sp. nov. 



Yellow, or in life more or less green ; head with a black trans- 

 verse line on the occiput ; thorax with slight dark markings, the 

 chief of these in dorsal aspect of the insect being a marginal line 

 on each side in front of the tegulae, a spot on each side just behind 

 them, the front and hind suture of the scutellum more or less, 

 and a spot at the hind angles of the propodeum. The pleura are 

 considerably more infuscate or blackish-marked than the dorsum. 

 Abdominal segments with a dark latero-marginal line more or 

 less distinct. Wings with the marginal vein infuscate and a dark 

 spot (including the stigmal vein) extends from it about half 

 across the wing. Four or five of the hair lines are more distinct 

 than others, those between the more distinct ones being mosth 

 somewhat confused and indefinite, or only short. 



Antennae with the scape about equal to the pedicel and funicle 

 together, the pedicel twice as long as the two funicle joints to- 

 gether, the first of the latter lorger than the second and sometimes 

 showing signs of transverse division near the base, as if to form 

 a second ring-joint, club longer than the pedicel, ring-joint and 

 funicle joints together. Length .6 mm. 



HAB. Alameda, California, and elsewhere in that state ; bred 

 from eggs of Hclochara coinniuins, no. 2440. 



STYLOPIDAE (Coleoptera) 



In Arizona at Nogales Koebele bred males of HaUctopJiagus 

 from three species of leaf-hoppers, of which two belong to the 

 Jassidae and one to the Delphacidae. The parasites themselves 

 are very closely allied to and greatly resemble the Australian 

 (and ? Vitian ) Halictophagus schzvarzii, but can be distinguished 

 by the characters of the genital segments, though these are quite 

 similar in general plan to those of the Australian species. I may 

 note that this is the first time Halictophagus has been bred from 

 a Dcl])hacid, the common parasite of which is EJcnchus. I should 

 add also that since my former paper on the Stylopidae was writ- 



