288 CALIFORNIA ACADEMY OF SCIENCES. 



and with a broader neck than in any other species which I 

 have seen. 



F. Iceviuscida, Lee. — I have seen eight or ten specimens 

 of this species collected by Mr. W. G. W. Harford, Mr. C. 

 Fuchs and myself in various parts of the middle coast region 

 of California. The prothorax is very strongly canaliculate. 



COLUSA n- gen. (Aleocbariui). 



Head borne on a narrow neck; inner lobe of tbe maxillas booked at tip 

 and fimbriate internally witb abort spinules; outer lobe witb a narrow por- 

 ous process at tip and also internally a few long robust bairs; first and second 

 joints of tbe labial palpi ecpial in diameter, cylindrical, almost anchylosed, 

 tbe second tbe longer, tbird very tbin, tbree-fourtbs as long as tbe first two 

 together, slightly bent; maxillary palpi slender, second joint very slender, 

 inuch narrower and distinctly shorter than the third, fourth extremely small, 

 subulate, received far within the apex of the third. Gular sutures rather 

 widely separated, convergent posteriorly. Labrum broadly arcuate, apex 

 finely undulated; transverse section of the epistoma broadly angulate. 

 Antennas long and slender; eyes very broadly oval, finely granulate. Pro- 

 sternum witb the antecoxal piece large, three times as wide as long, separated 

 from the sub- and intercoxal piece by a narrow raised margin; tbe intercoxal 

 piece produced posteriorly as a short but acute spine extending for a short 

 distance over the mesosternum; portion behind the coxre membranous; pos- 

 terior inflexed side pieces large, angulate, extending inward and slightly over 

 the mesosternum. Mesosternum large, transversely impressed behind the 

 narrowly elevated anterior margin but without any appearance of a neck, 

 finely carinate in the middle anteriorly; intercoxal process very slender, sep- 

 arating the coxae for three-fourths their length, very acutely rounded behind 

 and appearing detached from the metasternum, the latter extending beneath 

 it. Anterior coxae contiguous; intermediate narrowly separated. Legs slen- 

 der. Tarsi short, 5-5-5 jointed, first joint of tbe posterior longer than the 

 second. Pronotum not canaliculate. Abdomen strongly narrowed toward 

 base. 



The various species of Colusa, with their strongly con- 

 stricted head and very narrow neck, are of a distinctly Fala- 

 grioid type; the statement made above of a five -jointed an- 

 terior tarsus is therefore somewhat surprising; I have, how- 

 ever, carefully verified it by repeated observation of at least 

 six specimens, and in one particular example, where the 

 tarsus was partially detached from the tibia, the basal joint 

 could be very clearly seen, the first four being distinctly de- 

 fined against a bright background and without any indica- 



