114 



JOURNAL OF ECONOMIC ENTOMOLOGY 



[Vol. 12 



■ 



A) 



t 



Bi 



B2 



Fig. 6. Genitalia of Lachnosterna lanceolate: A — Male; B — Female; ^i — Dorsal 

 aspect; A2 — Caudal aspect; A3 — Lateral aspect; At — Ventral aspect; Bi — ^ Ventral 

 aspect; B2 Lateral aspect; B3 — Dorsal aspect. 



Length of Life-Cycle 



To summarize the life-cycle of a single generation of L. lanceolata, 

 we find the beetles appearing and laying eggs during June and July. 

 The eggs hatch in July and August. The average length of the egg 

 stage was found to be 16 days. Larvae are present until June of the 

 second year, giving a larval stage of slightly over 22 months. Pupae 

 occur in June and July with an average stage of 13 days. Two full 

 years are thus required for development, and, in some cases, where the 

 larval stage is prolonged, three years may be required. However, two 



