494 REPORT OF NEW JERSEY STATE MUSEUM. 



the fore-wings, and the lines are often continuous on both. At rest most 

 of the species keep the wings extended and flat, as if set for the cabinet. 



The larvae are known as "loopers," "span-worms," "inch-worms" or 

 "measuring-worms," because of their peculiar mode of progression. The 

 abdominal legs are in whole or in part obsolete, and the caterpillar when 

 in motion first extends the body full length, then humps itself in the 

 middle and brings the anal segments up to the thoracic feet. When the 

 body is again extended the insect has progressed nearly its own length. 

 These caterpillars often so closely resemble the twigs among which they 

 move that they are seen with difficulty only, and some have the habit of 

 stretching out at full length so as to appear like a little spur or twig. 

 Some species are injurious to cultivated plants; but all are within reach 

 of the arsenites. 



The list in this super-family has been prepared by Mr. John A. Gross- 

 beck, who has made a special study of it, based upon the previous work 

 and collections of the late Dr. George D. Hulst, whose results were fol- 

 lowed in the last list. Such changes as have been made necessary by 

 recent studies are indicated in the usual way. 



Family GEOMETRID^. 

 Sub-family HYDRIOMENIN^. 



DYSPTERIS Hbn. 



D. abortivaria H. S. Paterson VII, 24, VIII, 3 (Gr) ; Oaldwell (Cr) ; 

 Chester VIII, 23 (Dn) ; Orange Mts. VIII (Wdt) ; Newark; Staten 

 Island V (Ds) ; larva on grape. 



NYCTOBIA Hulst. 



N. limitaria Wlk. (fusifasciata Walk.) Paterson III, 29-V, 30 (Gr) ; 

 Newark, Staten Island IV (Ds) ; New Brunswick (Coll); food plant 

 "Amelanchier," Juneberry. 



N. anguilineata Grt. Newfoundland IV, 28; Staten Island IV, 1, Lake- 

 hurst V, 4 (Ds). 

 N. viridata Pack. Orange Mts. (Kp). 



CLADORA Hulst. 

 C. atroliturata Walk. Forest Hill, Hemlock Falls IV (Bz). 



RACHELA Hulst. 



R. bruceata Hulst. Plainfield XI, 22 (Coll); Staten Island XI, XII (Ds). 

 This was listed in the previous catalog as "Operophtera boreata," 

 an European species. 



