274 MAINE AGRICULTURAL EXPERIMENT STATION. 1917. 



Museum of Natural History as Hyalomyodes triangularis Loew. 

 It was described under the generic name of Hyalomyia by Loew 

 (1863, P- 85), and described again as a new species by Townsend 

 (1893, p. 429), as Hyalomyodes weedi. The identity of the types 

 was established by Coquillet (1897, p. 70), but he recognized 

 Hyalomyodes as a distinct genus from Hyalomyia, and therefore 

 the correct name stands as Hyalomyodes triangularis Loew. 



The larvae are internal parasites of the adult beetles. The 

 writer has no data as to the length of larval life, nor the manner 

 of oviposition, but it seems probable that the eggs are deposited 

 on the adult beetles in the spring or summer, after they have 

 come out from hibernation. When the larva is full grown, it 

 issues from the beetle, forcing its way out through the dorsal 

 side of the abdomen, between the last two abdominal segments. 

 The larva is white, with irregular brown splotches. In a few 

 hours a brown puparium is formed, and the adult fly emerges 

 about 2 weeks later. 

 1 puparium formed July 9, 1915; adult emerged July 21 12 days. 



1 puparium formed July 21, 1915 ; adult emerged Aug. 9 19 days. 



2 puparia formed July 26, 1915 ; adults emerged Aug. 9 14 days. 



The writer has not found any reference to the life-history 

 of this species in the literature. Celatoria spinosa Coquillet, a 

 related species which the writer has bred from the adults of 2 

 species of Altica, has been recorded by Coquillet (1890, p. 235) 

 as bred from the adults of Diabrotica soror LeC. 



CONTROL. 



The writer has had no occasion to work on the control of 

 these insects, but there is no reason to suppose that the measures 

 employed in combating other flea-beetles would not serve to 

 keep the alder flea-beetle in check, wherever their application 

 was practicable. A thorough spraying with arsenate of lead 

 at the rate of 3 pounds (paste form) to 50 gallons of water, 

 as soon as the beetles appear in the spring, and repeated in late 

 June and mid- July for the larvae, if necessary, would doubtless 

 control this species. 



THE SYNONYMY OF THE GENUS ALTICA GEOFFROY. 



Altica Geoffrey 1762. Hist. nat. des. ins. t. 1, p. 244. 



Haltica Illiger 1802. (Emend.) Mag. f. Insektenk. Bd. 1:138. 

 *Haltica Hoffman 1803. (Emend.) Ent. Hefte. 

 *Graptodera Chevrolat 1834. Cat. Dejean. ed. 2. 



