CATALOGUE OF INSECTS. 531 



O. peremiis Sauss. Gloucester Co., VIII, 10, Camden Co., VI, 15, VII, 12, 



Philadelphia, VI, 11, VII, 11, VIII, 17 (Fox). 

 O. Philadelphia Sauss. Caldwell (Cr). 

 O. quadrisectus Say. New Jersey, probably. 

 O. sasccularis Sauss. Lahaway, VI, 1, Jamesburg, VII, 15 (Sm), Gloucester 



Co., VII, 15, Philadelphia, VII, 23, VIII, 10 (Fox). 

 O. spinolae Sauss. New Jersey, probably. 



O. tigris Sauss. Lahaway, VI, 17, 24, New Brunswick, VII, 7 (Sm), Caldwell 



(Cr), Westville (Crn), Camden Co., IX, 5 (Fox). 

 O. unifasciatus Sauss. Caldwell (Cr), Gloucester Co., VII, 15 (Fox). 

 O. vagus Sauss. Gloucester Co., VII, 5, VIII, 12 (Fox). 



MONOBIA Sauss. 



M. quadridens Linn. Caldwell (Cr), Camden, VI, 28 (Fox), Newark, New 

 Brunswick. 



Family XXXI CHRYSIDIDJE. 



Sub-family II CHRYSIDIN.E. 



These are the "cuckoo bees," so called because they lay their eggs in the 

 cells of other bees or wasps, their larvae depriving the rightful owner of food if 

 they do not actually eat it first. These insects are of a brilliant metallic blue 

 or green, with a very firm chitinous outer surface, which is often deeply punc- 

 tured or otherwise sculptured. The abdomen has only a few visible segments, 

 the others being in the form of a retractile tube, at the end of which the small 

 sting is found. 



Some species are said to be true parasites in saw-flies, and this would make 

 the family beneficial on the whole. 



Our collections in this family are not good, and an unusually large proportion 

 of the species are listed because their general distribution is such that their 

 occurrence in New Jersey admits of little doubt. 



CHRYSIS Linn. 



C. cceruleans Fabr. New Brunswick, South Jersey, Lahaway, VI, 24, VII, 



18 (Sm). 



C. frey-gessneri Grib. Should occur in New Jersey. 



C. hilaris Dahlb. New Jersey, probably. 



C. inaequidens Dahlb. Should occur in New Jersey. 



C. intricata Brull< - ' New Jersey, probably. 



C. nitidula Fabr. Westville (Fox). 



C. nortoni Aaron. Pennsylvania. j 



C. parvula Fabr. Orange Mts. (Sm), Caldwell (Cr). Fig. 254.— Ckrysis species. 



