not a sure guide, for not only do they frequently vary exceed- 

 ingly from the type, but those of the male are sometimes very 

 dissimilar to the female. 



Mr. Haliday, to whom I am so much indebted for his va- 

 luable contributions and information, distinguishes Encyrtus 

 by its minute scapulas and transverse frsena, almost concealed 

 by the dorsolum. From his dissections I see that the man- 

 dibles of his JLncyrtus Coniferce are tridentate, and his genus 

 ERicYDNUS is characterized by "compact fusiform antennae. 

 Wings vi^itli the subcostal nervure branched towards the apex. 

 Abdomen beneath compressed, acuminate." 



I must refer to the " Guide" for a list of the British species 

 amounting to 28, only one of which has even been recorded by 

 any other English writer. 



1. E. scutellaris Dalm. in the Stockholm Trans, for 1820. 

 pi. 2./ 57. 58. 62. and 63. 



Bred out of a Coccus found on the Corylus Avellana. 

 v. E. Vitis Curt. Brit. Ent. jjI. 395. 



Aide: dull black, slightly pubescent and punctured ; antennae filiform and 

 very pilose, terminated by a slender club; ochreous, 2nd joint and the club 

 blackish : head with large punctures : scutellum with a tuft of hair at the 

 apex : abdomen with the membrane at the base whitish : wings iridescent, 

 transparent, nervures subochreous, costal one brown : legs ochreous, pos- 

 terior pair compressed, blackish, inside of the thighs, tibiae and central joints 

 of tarsi ochreous. 



Female: reddish orange, slightly pubescent and punctured : antennae with 

 the flagellum compressed and gradually dilated to the apex which is black, 

 and truncated : head sparingly punctured with large shallow impressions : 

 scutellum with a black tuft of hairs at the apex, the sides beneath brown : 

 abdomen reddish brown : wings transparent, superior clouded with fuscous 

 beyond the middle ; nervures, a spot before the middle and the stigma 

 brown : tibiag, intermediate brown at the base, posterior compressed, the 

 outer edge blackish, the tarsi brown at the base and tip. 



For specimens of this insect and the following observations 

 I am indebted to Mr. Samouelle, who bred them from the 

 Coccus of the Vine, and has no doubt that the black one, 

 which is much the rarest, is the male ; this somewhat resembles 

 the E. hirticornis^ and the female the E. Sis^ederi of Dalman. 



" Found on the Vine in Lambeth, July 9th and 10th, 1830. 

 These insects settle on the underside of the vine-leaves during 

 rain, and on the upper surface when the sun shines; they are 

 fond of door-posts, and seem to seek the heat. I also find 

 them in the house on the windows ; they leap well, at least a 

 foot at a time : the antennae, when the insect is active, are ap- 

 plied alternately to the object on which it rests." 

 6. E. cyaneus Dalm.? p. 160. 12.— luniilatus Curt. MS. 



June and July. Bred from a bundle of cocoons attached 

 to a leaf and covered with cottony yellow wool, like that which 

 envelopes some spiders' eggs. 



28. E. Urocerus Dalm. This, as well as a new species of Mr. 

 Haliday's, has the ovipositor robust and exserted. 



The Plant is Cyjienis fuscus^ from J. J. Bennet, Esq. 



