STRIGODEKMA. 253 



in cases of doubt. In all the species the males may be distinguished from the opposite 

 sex by the more attenuated abdomen, concave on its ventral surface, a difference which 

 is very rarely observable in the Anomalas. 



I. Striis elytrorum quinque inter suturam et Galium humeralem. 



1. Strigoderma marginata. 



Melolontha marginata, Olivier, Entom. i. no. 5, p. 70, t. 3. if. 23 c, b (1789) \ 



Melolontha cincta, Fabr. Ent. Syst. i. 2, p. 175 (1792) \ 



Melolontha ridens, Fabr. Syst. Eleuth. ii. p. 178 (1801) 3 . 



Melolontha glabrata, Fabr. Syst. Eleuth. ii. p. 178 4 . 



Var. Strigoderma pygmtsa (Fabr.) (partim), Burm. Handb. der Ent. iv. 1, p. 311. 



Hab. Panama, Chiriqui (Trotsch), San Feliz, San Lorenzo (Champion). — South 

 Ameeica 3 4 , Amazons; West Indies, Guadaloupe 1 2 . 



A very few examples only were captured in the State of Panama — some of the typical 

 colour as described by Olivier, and agreeing with specimens from the R. Amazons ; one 

 black with yellow T elytral spots (the var. glabrata) ; and others all black. The species 

 differs from its immediate allies of Central America in the thorax being sparingly and 

 distantly punctured, and having only one or two rather small rounded fovese on each side. 



2. Strigoderma intermedia. (Tab. XIV. fig. 8.) 



S. marginata differt solum thorace valde inaequali, foveis duabus utrinque saspe confluentibus sulcisque vagis 



disci tribus, in impressionibus alutaceis partibusque elevatis discrete punctatis. 

 Long. 5-7 millim. tf 5 • 



Hab. Mexico, Frontera in Tabasco (Hoge) ; British Honduras, E. Sarstoon (Blanca- 

 neaux); Guatemala (Salle), Cubulco, San Geronimo, El Jicaro (Champion). 



A large number of examples, nearly all coloured as in the typical S. marginata ; a 

 few examples only having in addition to the black elytral border a transverse median 

 fascia of the same colour. The legs and sides of the thorax are sometimes testaceous- 

 red. The thorax is glabrous. 



A well-marked specimen from Frontera is figured. 



3. Strigoderma mexicana. 



Strigoderma mexicana, Blanch. Cat. Coll. Ent. i. p. 202 \ 



Hab. Mexico 1 , Orizaba, Playa Vicente (Salle), Jalapa, Cordova, Tapachula in Chiapas 

 (Hoge). 



Distinguished from S. intermedia chiefly by the pubescent thorax, the surface being 

 sparsely clothed with erect hairs. In this it agrees with the following, S. protea, but 

 differs in the very uneven surface of the thorax (resembling that of S. intermedia), the 

 elevations of which are shining and coarsely punctured, not alutaceous-opaque. A 



