REVISION OF STREPSIPTERA PIERCE. 167 



apex; wings very broad, pale fuscous, veins obscure; tarsi as in Elen- 

 chus walkeri; legs and antennae very finely pubescent. Length f line; 

 wing expanse 1 line. 



33. ELENCHOIDES, new genus. 



Type of genus. — Elenchoides perhinsi Pierce. 



Parasitic upon the fulgorid genus Perkinsiella and confined to the 

 islands of the Pacific Ocean. 



The male cephalotheca is almost round and is characterized by 

 having the mandibular analogues much more nearly approximate 

 than the antennal or pupal analogues, the distance between the 

 mandibles being one-quarter of that between the pupal or antennal 

 analogues. 



The female has only three genital canals entering the brood canal, 

 which begins with the fifth segment. The opening of the latter is 

 semicircular, with a narrow curtain extending forward. The spiracles 

 are at the sides of the base of the head and opening of the brood canal. 

 The head is broadly cordiform, more angulate at apex than in 

 Mecynocera koebdei. The single pair of lobes or analogues are approx- 

 imate, but not contiguous, as in Mecynocera. 



The male larva has prominent mouth parts, the labrum being dis- 

 tinct, ellipsoidal; mandibles blunt, not approximate; maxilla?, appar- 

 ently three jointed, with two minute appendages on the third joint, 

 and subquadrate. 



The description is drawn from the figures by Muir (1906). 



i. ELENCHOIDES PERKINSI, new species. 



Elenchus tenuiconiis Muir, 1906, not Kirby, 1815, not Perkins, 1906. 



Host. — Perkinsiella vitiensis Kirby; Fiji (pi. 15, fig. 6). 



It is ver}^ evident from the figures that this species is not identical 

 with the American Mecynocera Jcaibelei, which Perkins referred to as 

 Elenchus tenuicornis Kirby. In fact, it is probable that they have 

 still another species parasitic on Aloha ipomoese. in Hawaii, which has 

 also been given the same determination. 



In the absence of specimens, the species must remain defined by 

 the host, habitat, and by the drawings published by Muir. 



a Fuscus, thorace valde gibboso, oculis magnis nigris, segmentis abdominalibus 

 constrictis, antennarum articulo 5to subclavato et in medio subangustato, articulum 

 referente; elytris clavatis nigricantibus versus apicem; alis latissimis pallidis fusces- 

 centibus, nervis obscurioribus; tarsis ut in El. walkeri, Curt, formatis; pedibus anten- 

 nisque pube tenuissima indutis. Long. corp. § lin.; expans. alarum fere lin. 1 

 (Westwood, 1835 b). 



