June, 1903.] Parasites of Certain Fulgoridae. 447 



not deposited in the larva before it has made a cocoon, is that, if 

 the female Cheiloneunis were to try depositing eggs in the Dry- 

 inns larva while the latter was still in the sack, upon the body of 

 the Ormenis nymph, this latter would most likely make a sudden 

 jump, as it is accustomed to do on being disturbed, and this 

 would dislodge the adult Cheiloneurus before she had had time to 

 deposit the four to six eggs within the Dryinus larva The Dry- 

 in us larva supplies just about enough food for five Cheilon- 

 eurus larvae. They very likely get their growth during the 

 autumn ; hibernate either in the larval or the pupal stage, and 

 transform to adults early in spring. This would give time enough 

 for more than one brood during the summer, providing its host 

 also has more than one brood, or perhaps it is not unlikeh' that 

 it finds some other host for an early summer brood. 



One interesting point in connection with this species, is its 

 parasitizing another H\ menopterous form ; whereas the other 

 species of Cheiloneurus are parasitic upon Coccidse, and the most 

 of the members of the same group, Kncyrtinee, are parasitic upon 

 various species of Coccidae and Aphididse. 



IV. GONATOPUS BICOLOR ASHM. 



V. Labko longitarsis Ashm. 



Bull. 45, U. S. National Museum, pp. 85,88, 1893. 



April II, 1903, a nymph of Liburnia lutulenta was found in- 

 fested with a parasite living in a sack protruding from the dorsal 

 side of the alxlonien (Plate 21, Fig. 13). The next day the 

 parasitic larva e^^caped from the host and spun a cocoon between 

 fragments of grass leaves. 



April 14 and 20, at)out a dozen more similarly parasitized 

 nymphs were obtained. In all of them the parasite had about 

 completed its growth, and in a few days all had escaped from 

 their hosts and spun cocoons. The cocoons were white, and 

 some were c) lindrical and formed in the groove of upper surface 

 of grass leaves ; others were made on flat surface of the breeding 

 jar, and were similar in form to those of Dryinus ormenidis 

 ( Plate 20, Fig. 2 ), 5mm. long and 3 mm. wide. 



May 12, the first adult appeared. It was a luale Labeo longi- 

 tarsis (Plate 21, F'ig. 12). May 14, a female Gonatopus bicolor 

 appeared (Plate 21, F'ig. 11). These were both from C3-Iindrical 

 cocoons on grass leaves. May 17, another female G. bicolor, and 

 May iS and 19, each, a male specimen of L. longitarsis appeared. 

 These were all that completed the transformation. None of the 

 females came from a cocoon like F'ig. 2 ; but one of the males 

 did. 



These parasites evidentl)' hibernate with their host, which 

 hibernates in the nymphal stage. 



